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zoneminder/src/zm_videostore.cpp

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// ZoneMinder Video Storage Implementation
// Written by Chris Wiggins
// http://chriswiggins.co.nz
// Modification by Steve Gilvarry
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
#include "zm_videostore.h"
#include "zm_logger.h"
#include "zm_monitor.h"
extern "C" {
#include "libavutil/time.h"
}
VideoStore::CodecData VideoStore::codec_data[] = {
{ AV_CODEC_ID_H264, "h264", "h264_vaapi", AV_PIX_FMT_NV12 },
{ AV_CODEC_ID_H264, "h264", "h264_omx", AV_PIX_FMT_YUV420P },
{ AV_CODEC_ID_H264, "h264", "h264", AV_PIX_FMT_YUV420P },
{ AV_CODEC_ID_H264, "h264", "libx264", AV_PIX_FMT_YUV420P },
{ AV_CODEC_ID_MJPEG, "mjpeg", "mjpeg", AV_PIX_FMT_YUVJ422P },
};
VideoStore::VideoStore(
const char *filename_in,
const char *format_in,
AVStream *p_video_in_stream,
AVCodecContext *p_video_in_ctx,
AVStream *p_audio_in_stream,
AVCodecContext *p_audio_in_ctx,
Monitor *p_monitor
) :
monitor(p_monitor),
out_format(nullptr),
oc(nullptr),
video_out_stream(nullptr),
audio_out_stream(nullptr),
video_out_codec(nullptr),
video_in_ctx(p_video_in_ctx),
video_out_ctx(nullptr),
video_in_stream(p_video_in_stream),
audio_in_stream(p_audio_in_stream),
audio_in_codec(nullptr),
audio_in_ctx(p_audio_in_ctx),
audio_out_codec(nullptr),
audio_out_ctx(nullptr),
video_in_frame(nullptr),
in_frame(nullptr),
out_frame(nullptr),
packets_written(0),
frame_count(0),
#if defined(HAVE_LIBSWRESAMPLE) || defined(HAVE_LIBAVRESAMPLE)
resample_ctx(nullptr),
#if defined(HAVE_LIBSWRESAMPLE)
fifo(nullptr),
#endif
#endif
converted_in_samples(nullptr),
filename(filename_in),
format(format_in),
video_first_pts(0), /* starting pts of first in frame/packet */
video_first_dts(0),
audio_first_pts(0),
audio_first_dts(0),
video_last_pts(AV_NOPTS_VALUE),
audio_last_pts(AV_NOPTS_VALUE),
next_dts(nullptr),
audio_next_pts(0),
max_stream_index(-1)
{
FFMPEGInit();
swscale.init();
} // VideoStore::VideoStore
bool VideoStore::open() {
Debug(1, "Opening video storage stream %s format: %s", filename, format);
int ret = avformat_alloc_output_context2(&oc, nullptr, nullptr, filename);
if ( ret < 0 ) {
Warning(
"Could not create video storage stream %s as no out ctx"
" could be assigned based on filename: %s",
filename, av_make_error_string(ret).c_str());
}
// Couldn't deduce format from filename, trying from format name
if ( !oc ) {
avformat_alloc_output_context2(&oc, nullptr, format, filename);
if ( !oc ) {
Error(
"Could not create video storage stream %s as no out ctx"
" could not be assigned based on filename or format %s",
filename, format);
return false;
}
} // end if ! oc
AVDictionary *pmetadata = nullptr;
ret = av_dict_set(&pmetadata, "title", "Zoneminder Security Recording", 0);
if ( ret < 0 ) Warning("%s:%d: title set failed", __FILE__, __LINE__);
oc->metadata = pmetadata;
out_format = oc->oformat;
out_format->flags |= AVFMT_TS_NONSTRICT; // allow non increasing dts
if ( video_in_stream ) {
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
zm_dump_codecpar(video_in_stream->codecpar);
#endif
if ( monitor->GetOptVideoWriter() == Monitor::PASSTHROUGH ) {
// Don't care what codec, just copy parameters
video_out_ctx = avcodec_alloc_context3(nullptr);
// There might not be a useful video_in_stream. v4l in might not populate this very
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
ret = avcodec_parameters_to_context(video_out_ctx, video_in_stream->codecpar);
#else
ret = avcodec_copy_context(video_out_ctx, video_in_ctx);
#endif
if ( ret < 0 ) {
Error("Could not initialize ctx parameters");
return false;
}
video_out_ctx->pix_fmt = fix_deprecated_pix_fmt(video_out_ctx->pix_fmt);
if ( oc->oformat->flags & AVFMT_GLOBALHEADER ) {
#if LIBAVCODEC_VERSION_CHECK(56, 35, 0, 64, 0)
video_out_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
#else
video_out_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
#endif
}
video_out_ctx->time_base = video_in_ctx->time_base;
if ( ! (video_out_ctx->time_base.num && video_out_ctx->time_base.den) ) {
Debug(2,"No timebase found in video in context, defaulting to Q");
video_out_ctx->time_base = AV_TIME_BASE_Q;
}
} else if ( monitor->GetOptVideoWriter() == Monitor::ENCODE ) {
int wanted_codec = monitor->OutputCodec();
if ( !wanted_codec ) {
// default to h264
Debug(2, "Defaulting to H264");
wanted_codec = AV_CODEC_ID_H264;
// FIXME what is the optimal codec? Probably low latency h264 which is effectively mjpeg
} else {
if ( AV_CODEC_ID_H264 != 27 and wanted_codec > 3 ) {
// Older ffmpeg had AV_CODEC_ID_MPEG2VIDEO_XVMC at position 3 has been deprecated
wanted_codec += 1;
}
Debug(2, "Codec wanted %d %s", wanted_codec, avcodec_get_name((AVCodecID)wanted_codec));
}
std::string wanted_encoder = monitor->Encoder();
for ( unsigned int i = 0; i < sizeof(codec_data) / sizeof(*codec_data); i++ ) {
if ( wanted_encoder != "" and wanted_encoder != "auto" ) {
if ( wanted_encoder != codec_data[i].codec_name ) {
Debug(1, "Not the right codec name %s != %s", codec_data[i].codec_name, wanted_encoder.c_str());
continue;
}
}
if ( codec_data[i].codec_id != wanted_codec ) {
Debug(1, "Not the right codec %d %s != %d %s",
codec_data[i].codec_id,
avcodec_get_name(codec_data[i].codec_id),
wanted_codec,
avcodec_get_name((AVCodecID)wanted_codec)
);
continue;
}
video_out_codec = avcodec_find_encoder_by_name(codec_data[i].codec_name);
if ( !video_out_codec ) {
Debug(1, "Didn't find encoder for %s", codec_data[i].codec_name);
continue;
}
Debug(1, "Found video codec for %s", codec_data[i].codec_name);
video_out_ctx = avcodec_alloc_context3(video_out_codec);
if ( oc->oformat->flags & AVFMT_GLOBALHEADER ) {
#if LIBAVCODEC_VERSION_CHECK(56, 35, 0, 64, 0)
video_out_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
#else
video_out_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
#endif
}
// When encoding, we are going to use the timestamp values instead of packet pts/dts
video_out_ctx->time_base = AV_TIME_BASE_Q;
video_out_ctx->codec_id = codec_data[i].codec_id;
video_out_ctx->pix_fmt = codec_data[i].pix_fmt;
video_out_ctx->level = 32;
// Don't have an input stream, so need to tell it what we are sending it, or are transcoding
video_out_ctx->width = monitor->Width();
video_out_ctx->height = monitor->Height();
video_out_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
if ( video_out_ctx->codec_id == AV_CODEC_ID_H264 ) {
video_out_ctx->bit_rate = 2000000;
video_out_ctx->gop_size = 12;
video_out_ctx->max_b_frames = 1;
} else if ( video_out_ctx->codec_id == AV_CODEC_ID_MPEG2VIDEO ) {
/* just for testing, we also add B frames */
video_out_ctx->max_b_frames = 2;
} else if ( video_out_ctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ) {
/* Needed to avoid using macroblocks in which some coeffs overflow.
* This does not happen with normal video, it just happens here as
* the motion of the chroma plane does not match the luma plane. */
video_out_ctx->mb_decision = 2;
}
AVDictionary *opts = 0;
std::string Options = monitor->GetEncoderOptions();
Debug(2, "Options? %s", Options.c_str());
ret = av_dict_parse_string(&opts, Options.c_str(), "=", ",#\n", 0);
if ( ret < 0 ) {
Warning("Could not parse ffmpeg encoder options list '%s'\n", Options.c_str());
} else {
AVDictionaryEntry *e = nullptr;
while ( (e = av_dict_get(opts, "", e, AV_DICT_IGNORE_SUFFIX)) != NULL ) {
Debug(3, "Encoder Option %s=%s", e->key, e->value);
}
}
if ( (ret = avcodec_open2(video_out_ctx, video_out_codec, &opts)) < 0 ) {
if ( wanted_encoder != "" and wanted_encoder != "auto" ) {
Warning("Can't open video codec (%s) %s",
video_out_codec->name,
av_make_error_string(ret).c_str()
);
} else {
Debug(1, "Can't open video codec (%s) %s",
video_out_codec->name,
av_make_error_string(ret).c_str()
);
}
video_out_codec = nullptr;
}
AVDictionaryEntry *e = nullptr;
while ( (e = av_dict_get(opts, "", e, AV_DICT_IGNORE_SUFFIX)) != nullptr ) {
Warning("Encoder Option %s not recognized by ffmpeg codec", e->key);
}
//av_dict_free(&opts);
if ( video_out_codec ) break;
avcodec_free_context(&video_out_ctx);
} // end foreach codec
if ( !video_out_codec ) {
Error("Can't open video codec!");
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
// We allocate and copy in newer ffmpeg, so need to free it
avcodec_free_context(&video_out_ctx);
#endif
//video_out_ctx = nullptr;
return false;
} // end if can't open codec
Debug(2, "Success opening codec");
} // end if copying or transcoding
zm_dump_codec(video_out_ctx);
} // end if video_in_stream
video_out_stream = avformat_new_stream(oc, video_out_codec);
if ( !video_out_stream ) {
Error("Unable to create video out stream");
return false;
}
max_stream_index = video_out_stream->index;
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
ret = avcodec_parameters_from_context(video_out_stream->codecpar, video_out_ctx);
if ( ret < 0 ) {
Error("Could not initialize stream parameteres");
return false;
}
#else
avcodec_copy_context(video_out_stream->codec, video_out_ctx);
#endif
// Only set orientation if doing passthrough, otherwise the frame image will be rotated
Monitor::Orientation orientation = monitor->getOrientation();
if ( orientation ) {
Debug(3, "Have orientation %d", orientation);
if ( orientation == Monitor::ROTATE_0 ) {
} else if ( orientation == Monitor::ROTATE_90 ) {
ret = av_dict_set(&video_out_stream->metadata, "rotate", "90", 0);
if ( ret < 0 ) Warning("%s:%d: title set failed", __FILE__, __LINE__);
} else if ( orientation == Monitor::ROTATE_180 ) {
ret = av_dict_set(&video_out_stream->metadata, "rotate", "180", 0);
if ( ret < 0 ) Warning("%s:%d: title set failed", __FILE__, __LINE__);
} else if ( orientation == Monitor::ROTATE_270 ) {
ret = av_dict_set(&video_out_stream->metadata, "rotate", "270", 0);
if ( ret < 0 ) Warning("%s:%d: title set failed", __FILE__, __LINE__);
} else {
Warning("Unsupported Orientation(%d)", orientation);
}
} // end if orientation
video_out_stream->time_base = video_in_stream ? video_in_stream->time_base : AV_TIME_BASE_Q;
if ( audio_in_stream and audio_in_ctx ) {
Debug(2, "Have audio_in_stream %p", audio_in_stream);
if (
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
audio_in_stream->codecpar->codec_id
#else
audio_in_stream->codec->codec_id
#endif
!= AV_CODEC_ID_AAC
) {
audio_out_codec = avcodec_find_encoder(AV_CODEC_ID_AAC);
if ( !audio_out_codec ) {
Error("Could not find codec for AAC");
} else {
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
audio_in_ctx = avcodec_alloc_context3(audio_out_codec);
ret = avcodec_parameters_to_context(audio_in_ctx,
audio_in_stream->codecpar);
audio_in_ctx->time_base = audio_in_stream->time_base;
#else
audio_in_ctx = audio_in_stream->codec;
#endif
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
audio_out_ctx = avcodec_alloc_context3(audio_out_codec);
if ( !audio_out_ctx ) {
Error("could not allocate codec ctx for AAC");
return false;
}
#else
audio_out_ctx = audio_out_stream->codec;
#endif
audio_out_stream = avformat_new_stream(oc, audio_out_codec);
audio_out_stream->time_base = audio_in_stream->time_base;
if ( !setup_resampler() ) {
return false;
}
} // end if found AAC codec
} else {
Debug(2, "Got AAC");
// normally we want to pass params from codec in here
// but since we are doing audio passthrough we don't care
audio_out_stream = avformat_new_stream(oc, audio_out_codec);
if ( !audio_out_stream ) {
Error("Could not allocate new stream");
return false;
}
audio_out_stream->time_base = audio_in_stream->time_base;
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
// Just use the ctx to copy the parameters over
audio_out_ctx = avcodec_alloc_context3(audio_out_codec);
if ( !audio_out_ctx ) {
Error("Could not allocate new output_context");
return false;
}
// We don't actually care what the time_base is..
audio_out_ctx->time_base = audio_in_ctx->time_base;
// Copy params from instream to ctx
ret = avcodec_parameters_to_context(
audio_out_ctx, audio_in_stream->codecpar);
if ( ret < 0 ) {
Error("Unable to copy audio params to ctx %s",
av_make_error_string(ret).c_str());
}
ret = avcodec_parameters_from_context(
audio_out_stream->codecpar, audio_out_ctx);
if ( ret < 0 ) {
Error("Unable to copy audio params to stream %s",
av_make_error_string(ret).c_str());
}
#else
audio_out_ctx = audio_out_stream->codec;
ret = avcodec_copy_context(audio_out_ctx, audio_in_stream->codec);
if ( ret < 0 ) {
Error("Unable to copy audio ctx %s",
av_make_error_string(ret).c_str());
audio_out_stream = nullptr;
return false;
} // end if
audio_out_ctx->codec_tag = 0;
#endif
if ( audio_out_ctx->channels > 1 ) {
Warning("Audio isn't mono, changing it.");
audio_out_ctx->channels = 1;
} else {
Debug(3, "Audio is mono");
}
} // end if is AAC
if ( oc->oformat->flags & AVFMT_GLOBALHEADER ) {
#if LIBAVCODEC_VERSION_CHECK(56, 35, 0, 64, 0)
audio_out_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
#else
audio_out_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
#endif
}
// We will assume that subsequent stream allocations will increase the index
max_stream_index = audio_out_stream->index;
} // end if audio_in_stream
//max_stream_index is 0-based, so add 1
next_dts = new int64_t[max_stream_index+1];
for ( int i = 0; i <= max_stream_index; i++ ) {
next_dts[i] = 0;
}
/* open the out file, if needed */
if ( !(out_format->flags & AVFMT_NOFILE) ) {
ret = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE, nullptr, nullptr);
if ( ret < 0 ) {
Error("Could not open out file '%s': %s", filename,
av_make_error_string(ret).c_str());
return false;
}
}
zm_dump_stream_format(oc, 0, 0, 1);
if ( audio_out_stream ) zm_dump_stream_format(oc, 1, 0, 1);
AVDictionary *opts = nullptr;
std::string option_string = monitor->GetEncoderOptions();
ret = av_dict_parse_string(&opts, option_string.c_str(), "=", ",\n", 0);
if ( ret < 0 ) {
Warning("Could not parse ffmpeg output options '%s'", option_string.c_str());
}
const AVDictionaryEntry *movflags_entry = av_dict_get(opts, "movflags", nullptr, AV_DICT_MATCH_CASE);
if ( !movflags_entry ) {
Debug(1, "setting movflags to frag_keyframe+empty_moov");
// Shiboleth reports that this may break seeking in mp4 before it downloads
av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
} else {
Debug(1, "using movflags %s", movflags_entry->value);
}
if ( (ret = avformat_write_header(oc, &opts)) < 0 ) {
Warning("Unable to set movflags trying with defaults.");
ret = avformat_write_header(oc, nullptr);
} else if ( av_dict_count(opts) != 0 ) {
Info("some options not used, turn on debugging for a list.");
AVDictionaryEntry *e = nullptr;
while ( (e = av_dict_get(opts, "", e, AV_DICT_IGNORE_SUFFIX)) != nullptr ) {
Debug(1, "Encoder Option %s=>%s", e->key, e->value);
if ( !e->value ) {
av_dict_set(&opts, e->key, nullptr, 0);
}
}
}
if ( opts ) av_dict_free(&opts);
if ( ret < 0 ) {
Error("Error occurred when writing out file header to %s: %s",
filename, av_make_error_string(ret).c_str());
avio_closep(&oc->pb);
return false;
}
zm_dump_stream_format(oc, 0, 0, 1);
if (audio_out_stream) zm_dump_stream_format(oc, 1, 0, 1);
return true;
} // end bool VideoStore::open()
void VideoStore::flush_codecs() {
int ret;
// The codec queues data. We need to send a flush command and out
// whatever we get. Failures are not fatal.
AVPacket pkt;
// Without these we seg fault becuse av_init_packet doesn't init them
pkt.data = nullptr;
pkt.size = 0;
av_init_packet(&pkt);
// I got crashes if the codec didn't do DELAY, so let's test for it.
if ( video_out_ctx->codec && ( video_out_ctx->codec->capabilities &
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
AV_CODEC_CAP_DELAY
#else
CODEC_CAP_DELAY
#endif
) ) {
// Put encoder into flushing mode
while ( (ret = zm_send_frame_receive_packet(video_out_ctx, nullptr, pkt) ) > 0 ) {
av_packet_rescale_ts(&pkt,
video_out_ctx->time_base,
video_out_stream->time_base);
write_packet(&pkt, video_out_stream);
zm_av_packet_unref(&pkt);
} // while have buffered frames
Debug(1, "Done writing buffered video.");
} // end if have delay capability
if ( audio_out_codec ) {
// The codec queues data. We need to send a flush command and out
// whatever we get. Failures are not fatal.
int frame_size = audio_out_ctx->frame_size;
/*
* At the end of the file, we pass the remaining samples to
* the encoder. */
while ( zm_resample_get_delay(resample_ctx, audio_out_ctx->sample_rate) ) {
zm_resample_audio(resample_ctx, nullptr, out_frame);
if ( zm_add_samples_to_fifo(fifo, out_frame) ) {
// Should probably set the frame size to what is reported FIXME
if ( zm_get_samples_from_fifo(fifo, out_frame) ) {
if ( zm_send_frame_receive_packet(audio_out_ctx, out_frame, pkt) > 0 ) {
av_packet_rescale_ts(&pkt,
audio_out_ctx->time_base,
audio_out_stream->time_base);
write_packet(&pkt, audio_out_stream);
zm_av_packet_unref(&pkt);
}
} // end if data returned from fifo
}
} // end while have buffered samples in the resampler
Debug(2, "av_audio_fifo_size = %d", av_audio_fifo_size(fifo));
while ( av_audio_fifo_size(fifo) > 0 ) {
/* Take one frame worth of audio samples from the FIFO buffer,
* encode it and write it to the output file. */
Debug(1, "Remaining samples in fifo for AAC codec frame_size %d > fifo size %d",
frame_size, av_audio_fifo_size(fifo));
// SHould probably set the frame size to what is reported FIXME
if ( av_audio_fifo_read(fifo, (void **)out_frame->data, frame_size) ) {
if ( zm_send_frame_receive_packet(audio_out_ctx, out_frame, pkt) ) {
pkt.stream_index = audio_out_stream->index;
av_packet_rescale_ts(&pkt,
audio_out_ctx->time_base,
audio_out_stream->time_base);
write_packet(&pkt, audio_out_stream);
zm_av_packet_unref(&pkt);
}
} // end if data returned from fifo
} // end while still data in the fifo
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
// Put encoder into flushing mode
avcodec_send_frame(audio_out_ctx, nullptr);
#endif
while (1) {
if ( 0 >= zm_receive_packet(audio_out_ctx, pkt) ) {
Debug(1, "No more packets");
break;
}
ZM_DUMP_PACKET(pkt, "raw from encoder");
av_packet_rescale_ts(&pkt, audio_out_ctx->time_base, audio_out_stream->time_base);
ZM_DUMP_STREAM_PACKET(audio_out_stream, pkt, "writing flushed packet");
write_packet(&pkt, audio_out_stream);
zm_av_packet_unref(&pkt);
} // while have buffered frames
} // end if audio_out_codec
} // end flush_codecs
VideoStore::~VideoStore() {
if ( oc->pb ) {
flush_codecs();
// Flush Queues
Debug(1, "Flushing interleaved queues");
av_interleaved_write_frame(oc, nullptr);
Debug(1, "Writing trailer");
/* Write the trailer before close */
if ( int rc = av_write_trailer(oc) ) {
Error("Error writing trailer %s", av_err2str(rc));
} else {
Debug(3, "Success Writing trailer");
}
// When will we not be using a file ?
if ( !(out_format->flags & AVFMT_NOFILE) ) {
/* Close the out file. */
Debug(2, "Closing");
if ( int rc = avio_close(oc->pb) ) {
Error("Error closing avio %s", av_err2str(rc));
}
} else {
Debug(3, "Not closing avio because we are not writing to a file.");
}
oc->pb = nullptr;
} // end if oc->pb
// I wonder if we should be closing the file first.
// I also wonder if we really need to be doing all the ctx
// allocation/de-allocation constantly, or whether we can just re-use it.
// Just do a file open/close/writeheader/etc.
// What if we were only doing audio recording?
if ( video_out_stream ) {
video_in_ctx = nullptr;
Debug(4, "Freeing video_out_ctx");
avcodec_free_context(&video_out_ctx);
} // end if video_out_stream
if ( audio_out_stream ) {
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
// We allocate and copy in newer ffmpeg, so need to free it
//avcodec_free_context(&audio_in_ctx);
#endif
//Debug(4, "Success freeing audio_in_ctx");
audio_in_codec = nullptr;
if ( audio_out_ctx ) {
Debug(4, "Success closing audio_out_ctx");
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
avcodec_free_context(&audio_out_ctx);
#endif
}
#if defined(HAVE_LIBAVRESAMPLE) || defined(HAVE_LIBSWRESAMPLE)
if ( resample_ctx ) {
if ( fifo ) {
av_audio_fifo_free(fifo);
fifo = nullptr;
}
#if defined(HAVE_LIBSWRESAMPLE)
swr_free(&resample_ctx);
#else
#if defined(HAVE_LIBAVRESAMPLE)
avresample_close(resample_ctx);
avresample_free(&resample_ctx);
#endif
#endif
}
if ( in_frame ) {
av_frame_free(&in_frame);
in_frame = nullptr;
}
if ( out_frame ) {
av_frame_free(&out_frame);
out_frame = nullptr;
}
if ( converted_in_samples ) {
av_free(converted_in_samples);
converted_in_samples = nullptr;
}
#endif
} // end if audio_out_stream
Debug(4, "free context");
/* free the streams */
avformat_free_context(oc);
delete[] next_dts;
next_dts = nullptr;
} // VideoStore::~VideoStore()
bool VideoStore::setup_resampler() {
#if !defined(HAVE_LIBSWRESAMPLE) && !defined(HAVE_LIBAVRESAMPLE)
Error(
"Not built with resample library. "
"Cannot do audio conversion to AAC");
return false;
#else
int ret;
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
// Newer ffmpeg wants to keep everything separate... so have to lookup our own
// decoder, can't reuse the one from the camera.
audio_in_codec =
avcodec_find_decoder(audio_in_stream->codecpar->codec_id);
audio_in_ctx = avcodec_alloc_context3(audio_in_codec);
// Copy params from instream to ctx
ret = avcodec_parameters_to_context(
audio_in_ctx, audio_in_stream->codecpar);
if ( ret < 0 ) {
Error("Unable to copy audio params to ctx %s",
av_make_error_string(ret).c_str());
}
#else
// codec is already open in ffmpeg_camera
audio_in_ctx = audio_in_stream->codec;
audio_in_codec = reinterpret_cast<const AVCodec *>(audio_in_ctx->codec);
if ( !audio_in_codec ) {
audio_in_codec = avcodec_find_decoder(audio_in_stream->codec->codec_id);
}
if ( !audio_in_codec ) {
return false;
}
#endif
// if the codec is already open, nothing is done.
if ( (ret = avcodec_open2(audio_in_ctx, audio_in_codec, nullptr)) < 0 ) {
Error("Can't open audio in codec!");
return false;
}
Debug(2, "Got something other than AAC (%s)", audio_in_codec->name);
// Some formats (i.e. WAV) do not produce the proper channel layout
if ( audio_in_ctx->channel_layout == 0 ) {
Debug(2, "Setting input channel layout to mono");
// Perhaps we should not be modifying the audio_in_ctx....
audio_in_ctx->channel_layout = av_get_channel_layout("mono");
}
/* put sample parameters */
audio_out_ctx->bit_rate = audio_in_ctx->bit_rate <= 32768 ? audio_in_ctx->bit_rate : 32768;
audio_out_ctx->sample_rate = audio_in_ctx->sample_rate;
audio_out_ctx->sample_fmt = audio_in_ctx->sample_fmt;
audio_out_ctx->channels = audio_in_ctx->channels;
audio_out_ctx->channel_layout = audio_in_ctx->channel_layout;
audio_out_ctx->sample_fmt = audio_in_ctx->sample_fmt;
#if LIBAVCODEC_VERSION_CHECK(56, 8, 0, 60, 100)
if ( !audio_out_ctx->channel_layout ) {
Debug(3, "Correcting channel layout from (%d) to (%d)",
audio_out_ctx->channel_layout,
av_get_default_channel_layout(audio_out_ctx->channels)
);
audio_out_ctx->channel_layout = av_get_default_channel_layout(audio_out_ctx->channels);
}
#endif
if ( audio_out_codec->supported_samplerates ) {
int found = 0;
for ( unsigned int i = 0; audio_out_codec->supported_samplerates[i]; i++ ) {
if ( audio_out_ctx->sample_rate ==
audio_out_codec->supported_samplerates[i] ) {
found = 1;
break;
}
}
if ( found ) {
Debug(3, "Sample rate is good %d", audio_out_ctx->sample_rate);
} else {
audio_out_ctx->sample_rate =
audio_out_codec->supported_samplerates[0];
Debug(1, "Sample rate is no good, setting to (%d)",
audio_out_codec->supported_samplerates[0]);
}
}
/* check that the encoder supports s16 pcm in */
if ( !check_sample_fmt(audio_out_codec, audio_out_ctx->sample_fmt) ) {
Debug(3, "Encoder does not support sample format %s, setting to FLTP",
av_get_sample_fmt_name(audio_out_ctx->sample_fmt));
audio_out_ctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
}
// Example code doesn't set the codec tb. I think it just uses whatever defaults
//audio_out_ctx->time_base = (AVRational){1, audio_out_ctx->sample_rate};
AVDictionary *opts = nullptr;
// Needed to allow AAC
if ( (ret = av_dict_set(&opts, "strict", "experimental", 0)) < 0 ) {
Error("Couldn't set experimental");
}
ret = avcodec_open2(audio_out_ctx, audio_out_codec, &opts);
av_dict_free(&opts);
if ( ret < 0 ) {
Error("could not open codec (%d) (%s)",
ret, av_make_error_string(ret).c_str());
audio_out_codec = nullptr;
audio_out_ctx = nullptr;
audio_out_stream = nullptr;
return false;
}
zm_dump_codec(audio_out_ctx);
audio_out_stream->time_base = (AVRational){1, audio_out_ctx->sample_rate};
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
if ( (ret = avcodec_parameters_from_context(
audio_out_stream->codecpar,
audio_out_ctx)) < 0 ) {
Error("Could not initialize stream parameteres");
return false;
}
zm_dump_codecpar(audio_out_stream->codecpar);
#endif
Debug(3,
"Time bases: AUDIO in stream (%d/%d) in codec: (%d/%d) out "
"stream: (%d/%d) out codec (%d/%d)",
audio_in_stream->time_base.num, audio_in_stream->time_base.den,
audio_in_ctx->time_base.num, audio_in_ctx->time_base.den,
audio_out_stream->time_base.num, audio_out_stream->time_base.den,
audio_out_ctx->time_base.num, audio_out_ctx->time_base.den);
Debug(1,
"Audio in bit_rate (%d) sample_rate(%d) channels(%d) fmt(%d) "
"layout(%d) frame_size(%d)",
audio_in_ctx->bit_rate, audio_in_ctx->sample_rate,
audio_in_ctx->channels, audio_in_ctx->sample_fmt,
audio_in_ctx->channel_layout, audio_in_ctx->frame_size);
Debug(1,
"Audio out context bit_rate (%d) sample_rate(%d) channels(%d) fmt(%d) "
"layout(%d) frame_size(%d)",
audio_out_ctx->bit_rate, audio_out_ctx->sample_rate,
audio_out_ctx->channels, audio_out_ctx->sample_fmt,
audio_out_ctx->channel_layout, audio_out_ctx->frame_size);
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
Debug(1,
"Audio out stream bit_rate (%d) sample_rate(%d) channels(%d) fmt(%d) "
"layout(%d) frame_size(%d)",
audio_out_stream->codecpar->bit_rate, audio_out_stream->codecpar->sample_rate,
audio_out_stream->codecpar->channels, audio_out_stream->codecpar->format,
audio_out_stream->codecpar->channel_layout, audio_out_stream->codecpar->frame_size);
#else
Debug(1,
"Audio out bit_rate (%d) sample_rate(%d) channels(%d) fmt(%d) "
"layout(%d) frame_size(%d)",
audio_out_stream->codec->bit_rate, audio_out_stream->codec->sample_rate,
audio_out_stream->codec->channels, audio_out_stream->codec->sample_fmt,
audio_out_stream->codec->channel_layout, audio_out_stream->codec->frame_size);
#endif
/** Create a new frame to store the audio samples. */
if ( ! in_frame ) {
if (!(in_frame = zm_av_frame_alloc())) {
Error("Could not allocate in frame");
return false;
}
}
/** Create a new frame to store the audio samples. */
if ( !(out_frame = zm_av_frame_alloc()) ) {
Error("Could not allocate out frame");
av_frame_free(&in_frame);
return false;
}
out_frame->sample_rate = audio_out_ctx->sample_rate;
if ( !(fifo = av_audio_fifo_alloc(
audio_out_ctx->sample_fmt,
audio_out_ctx->channels, 1)) ) {
Error("Could not allocate FIFO");
return false;
}
#if defined(HAVE_LIBSWRESAMPLE)
resample_ctx = swr_alloc_set_opts(nullptr,
audio_out_ctx->channel_layout,
audio_out_ctx->sample_fmt,
audio_out_ctx->sample_rate,
audio_in_ctx->channel_layout,
audio_in_ctx->sample_fmt,
audio_in_ctx->sample_rate,
0, nullptr);
if ( !resample_ctx ) {
Error("Could not allocate resample context");
av_frame_free(&in_frame);
av_frame_free(&out_frame);
return false;
}
if ( (ret = swr_init(resample_ctx)) < 0 ) {
Error("Could not open resampler");
av_frame_free(&in_frame);
av_frame_free(&out_frame);
swr_free(&resample_ctx);
return false;
}
Debug(1,"Success setting up SWRESAMPLE");
#else
#if defined(HAVE_LIBAVRESAMPLE)
// Setup the audio resampler
resample_ctx = avresample_alloc_context();
if ( !resample_ctx ) {
Error("Could not allocate resample ctx");
av_frame_free(&in_frame);
av_frame_free(&out_frame);
return false;
}
av_opt_set_int(resample_ctx, "in_channel_layout",
audio_in_ctx->channel_layout, 0);
av_opt_set_int(resample_ctx, "in_sample_fmt",
audio_in_ctx->sample_fmt, 0);
av_opt_set_int(resample_ctx, "in_sample_rate",
audio_in_ctx->sample_rate, 0);
av_opt_set_int(resample_ctx, "in_channels",
audio_in_ctx->channels, 0);
av_opt_set_int(resample_ctx, "out_channel_layout",
audio_in_ctx->channel_layout, 0);
av_opt_set_int(resample_ctx, "out_sample_fmt",
audio_out_ctx->sample_fmt, 0);
av_opt_set_int(resample_ctx, "out_sample_rate",
audio_out_ctx->sample_rate, 0);
av_opt_set_int(resample_ctx, "out_channels",
audio_out_ctx->channels, 0);
if ( (ret = avresample_open(resample_ctx)) < 0 ) {
Error("Could not open resample ctx");
return false;
} else {
Debug(2, "Success opening resampler");
}
#endif
#endif
out_frame->nb_samples = audio_out_ctx->frame_size;
out_frame->format = audio_out_ctx->sample_fmt;
#if LIBAVCODEC_VERSION_CHECK(56, 8, 0, 60, 100)
out_frame->channels = audio_out_ctx->channels;
#endif
out_frame->channel_layout = audio_out_ctx->channel_layout;
out_frame->sample_rate = audio_out_ctx->sample_rate;
// The codec gives us the frame size, in samples, we calculate the size of the
// samples buffer in bytes
unsigned int audioSampleBuffer_size = av_samples_get_buffer_size(
nullptr, audio_out_ctx->channels,
audio_out_ctx->frame_size,
audio_out_ctx->sample_fmt, 0);
converted_in_samples = reinterpret_cast<uint8_t *>(av_malloc(audioSampleBuffer_size));
if ( !converted_in_samples ) {
Error("Could not allocate converted in sample pointers");
return false;
} else {
Debug(2, "Frame Size %d, sample buffer size %d", audio_out_ctx->frame_size, audioSampleBuffer_size);
}
// Setup the data pointers in the AVFrame
if ( avcodec_fill_audio_frame(
out_frame, audio_out_ctx->channels,
audio_out_ctx->sample_fmt,
(const uint8_t *)converted_in_samples,
audioSampleBuffer_size, 0) < 0 ) {
Error("Could not allocate converted in sample pointers");
return false;
}
return true;
#endif
} // end bool VideoStore::setup_resampler()
int VideoStore::writePacket(ZMPacket *ipkt) {
if ( ipkt->codec_type == AVMEDIA_TYPE_VIDEO ) {
return writeVideoFramePacket(ipkt);
} else if ( ipkt->codec_type == AVMEDIA_TYPE_AUDIO ) {
return writeAudioFramePacket(ipkt);
}
Error("Unknown stream type in packet (%d)", ipkt->codec_type);
return 0;
}
int VideoStore::writeVideoFramePacket(ZMPacket *zm_packet) {
int ret;
frame_count += 1;
// if we have to transcode
if ( monitor->GetOptVideoWriter() == Monitor::ENCODE ) {
Debug(3, "Have encoding video frame count (%d)", frame_count);
if ( !zm_packet->out_frame ) {
Debug(3, "Have no out frame");
AVFrame *out_frame = zm_packet->get_out_frame(video_out_ctx);
if ( !out_frame ) {
Error("Unable to allocate a frame");
return 0;
}
if ( zm_packet->image ) {
Debug(2, "Have an image, convert it");
//Go straight to out frame
swscale.Convert(
zm_packet->image,
zm_packet->buffer,
zm_packet->codec_imgsize,
zm_packet->image->AVPixFormat(),
video_out_ctx->pix_fmt,
video_out_ctx->width,
video_out_ctx->height
);
} else if ( !zm_packet->in_frame ) {
Debug(4, "Have no in_frame");
if (zm_packet->packet.size and !zm_packet->decoded) {
Debug(4, "Decoding");
if ( !zm_packet->decode(video_in_ctx) ) {
Debug(2, "unable to decode yet.");
return 0;
}
// Go straight to out frame
swscale.Convert(zm_packet->in_frame, out_frame);
} else {
Error("Have neither in_frame or image in packet %p %d!",
zm_packet, zm_packet->image_index);
return 0;
} // end if has packet or image
} else {
// Have in_frame.... may need to convert it to out_frame
swscale.Convert(zm_packet->in_frame, zm_packet->out_frame);
} // end if no in_frame
} // end if no out_frame
//zm_packet->out_frame->coded_picture_number = frame_count;
//zm_packet->out_frame->display_picture_number = frame_count;
//zm_packet->out_frame->sample_aspect_ratio = (AVRational){ 0, 1 };
// Do this to allow the encoder to choose whether to use I/P/B frame
//zm_packet->out_frame->pict_type = AV_PICTURE_TYPE_NONE;
//zm_packet->out_frame->key_frame = zm_packet->keyframe;
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
zm_packet->out_frame->pkt_duration = 0;
#endif
int64_t in_pts = zm_packet->timestamp->tv_sec * (uint64_t)1000000 + zm_packet->timestamp->tv_usec;
if ( !video_first_pts ) {
video_first_pts = in_pts;
Debug(2, "No video_first_pts, set to (%" PRId64 ") secs(%d) usecs(%d)",
video_first_pts, zm_packet->timestamp->tv_sec, zm_packet->timestamp->tv_usec);
zm_packet->out_frame->pts = 0;
} else {
uint64_t useconds = in_pts - video_first_pts;
zm_packet->out_frame->pts = av_rescale_q(useconds, AV_TIME_BASE_Q, video_out_ctx->time_base);
Debug(2, " Setting pts for frame(%d) to (%" PRId64 ") from (start %" PRIu64 " - %" PRIu64 " - secs(%d) usecs(%d) @ %d/%d",
frame_count, zm_packet->out_frame->pts, video_first_pts, useconds, zm_packet->timestamp->tv_sec, zm_packet->timestamp->tv_usec,
video_out_ctx->time_base.num,
video_out_ctx->time_base.den
);
}
av_init_packet(&opkt);
opkt.data = nullptr;
opkt.size = 0;
ret = zm_send_frame_receive_packet(video_out_ctx, zm_packet->out_frame, opkt);
if ( ret <= 0 ) {
if ( ret < 0 ) {
Error("Could not send frame (error '%s')", av_make_error_string(ret).c_str());
}
return ret;
}
ZM_DUMP_PACKET(opkt, "packet returned by codec");
// Need to adjust pts/dts values from codec time to stream time
if ( opkt.pts != AV_NOPTS_VALUE )
opkt.pts = av_rescale_q(opkt.pts, video_out_ctx->time_base, video_out_stream->time_base);
if ( opkt.dts != AV_NOPTS_VALUE )
opkt.dts = av_rescale_q(opkt.dts, video_out_ctx->time_base, video_out_stream->time_base);
Debug(1, "Timebase conversions using %d/%d -> %d/%d",
video_out_ctx->time_base.num,
video_out_ctx->time_base.den,
video_out_stream->time_base.num,
video_out_stream->time_base.den);
int64_t duration = 0;
if ( zm_packet->in_frame ) {
if ( zm_packet->in_frame->pkt_duration ) {
duration = av_rescale_q(
zm_packet->in_frame->pkt_duration,
video_in_stream->time_base,
video_out_stream->time_base);
Debug(1, "duration from ipkt: pts(%" PRId64 ") = pkt_duration(%" PRId64 ") => (%" PRId64 ") (%d/%d) (%d/%d)",
zm_packet->in_frame->pts,
zm_packet->in_frame->pkt_duration,
duration,
video_in_stream->time_base.num,
video_in_stream->time_base.den,
video_out_stream->time_base.num,
video_out_stream->time_base.den
);
} else if ( video_last_pts != AV_NOPTS_VALUE ) {
duration =
av_rescale_q(
zm_packet->in_frame->pts - video_last_pts,
video_in_stream->time_base,
video_out_stream->time_base);
Debug(1, "duration calc: pts(%" PRId64 ") - last_pts(%" PRId64 ") = (%" PRId64 ") => (%" PRId64 ")",
zm_packet->in_frame->pts,
video_last_pts,
zm_packet->in_frame->pts - video_last_pts,
duration
);
if ( duration <= 0 ) {
duration = zm_packet->in_frame->pkt_duration ? zm_packet->in_frame->pkt_duration : av_rescale_q(1, video_in_stream->time_base, video_out_stream->time_base);
}
} // end if in_frmae->pkt_duration
video_last_pts = zm_packet->in_frame->pts;
} else {
//duration = av_rescale_q(zm_packet->out_frame->pts - video_last_pts, video_in_stream->time_base, video_out_stream->time_base);
} // end if in_frmae
opkt.duration = duration;
} else { // Passthrough
AVPacket *ipkt = &zm_packet->packet;
ZM_DUMP_STREAM_PACKET(video_in_stream, (*ipkt), "Doing passthrough, just copy packet");
// Just copy it because the codec is the same
av_init_packet(&opkt);
opkt.data = ipkt->data;
opkt.size = ipkt->size;
opkt.flags = ipkt->flags;
opkt.duration = ipkt->duration;
if ( ipkt->dts != AV_NOPTS_VALUE ) {
if ( !video_first_dts ) {
Debug(2, "Starting video first_dts will become %" PRId64, ipkt->dts);
video_first_dts = ipkt->dts;
}
opkt.dts = ipkt->dts - video_first_dts;
} else {
opkt.dts = next_dts[video_out_stream->index] ? av_rescale_q(next_dts[video_out_stream->index], video_out_stream->time_base, video_in_stream->time_base) : 0;
Debug(3, "Setting dts to video_next_dts %" PRId64 " from %" PRId64, opkt.dts, next_dts[video_out_stream->index]);
}
if ( ipkt->pts != AV_NOPTS_VALUE ) {
opkt.pts = ipkt->pts - video_first_dts;
} else {
opkt.pts = AV_NOPTS_VALUE;
}
av_packet_rescale_ts(&opkt, video_in_stream->time_base, video_out_stream->time_base);
ZM_DUMP_STREAM_PACKET(video_out_stream, opkt, "after pts adjustment");
} // end if codec matches
write_packet(&opkt, video_out_stream);
zm_av_packet_unref(&opkt);
return 1;
} // end int VideoStore::writeVideoFramePacket( AVPacket *ipkt )
int VideoStore::writeAudioFramePacket(ZMPacket *zm_packet) {
AVPacket *ipkt = &zm_packet->packet;
int ret;
if ( !audio_out_stream ) {
Debug(1, "Called writeAudioFramePacket when no audio_out_stream");
return 0;
// FIXME -ve return codes do not free packet in ffmpeg_camera at the moment
}
ZM_DUMP_STREAM_PACKET(audio_in_stream, (*ipkt), "input packet");
if ( !audio_first_dts ) {
audio_first_dts = ipkt->dts;
audio_next_pts = audio_out_ctx->frame_size;
}
Debug(3, "audio first_dts to %" PRId64, audio_first_dts);
// Need to adjust pts before feeding to decoder.... should really copy the pkt instead of modifying it
if ( audio_out_codec ) {
// I wonder if we can get multiple frames per packet? Probably
ret = zm_send_packet_receive_frame(audio_in_ctx, in_frame, *ipkt);
if ( ret < 0 ) {
Debug(3, "failed to receive frame code: %d", ret);
return 0;
}
zm_dump_frame(in_frame, "In frame from decode");
AVFrame *input_frame = in_frame;
while ( zm_resample_audio(resample_ctx, input_frame, out_frame) ) {
//out_frame->pkt_duration = in_frame->pkt_duration; // resampling doesn't alter duration
if ( zm_add_samples_to_fifo(fifo, out_frame) <= 0 )
break;
// We put the samples into the fifo so we are basically resetting the frame
out_frame->nb_samples = audio_out_ctx->frame_size;
if ( zm_get_samples_from_fifo(fifo, out_frame) <= 0 )
break;
out_frame->pts = audio_next_pts;
audio_next_pts += out_frame->nb_samples;
zm_dump_frame(out_frame, "Out frame after resample");
av_init_packet(&opkt);
if ( zm_send_frame_receive_packet(audio_out_ctx, out_frame, opkt) <= 0 )
break;
// Scale the PTS of the outgoing packet to be the correct time base
av_packet_rescale_ts(&opkt,
audio_out_ctx->time_base,
audio_out_stream->time_base);
write_packet(&opkt, audio_out_stream);
zm_av_packet_unref(&opkt);
if ( zm_resample_get_delay(resample_ctx, out_frame->sample_rate) < out_frame->nb_samples)
break;
// This will send a null frame, emptying out the resample buffer
input_frame = nullptr;
} // end while there is data in the resampler
} else {
av_init_packet(&opkt);
opkt.data = ipkt->data;
opkt.size = ipkt->size;
opkt.flags = ipkt->flags;
opkt.duration = ipkt->duration;
opkt.pts = ipkt->pts - audio_first_dts;
opkt.dts = ipkt->dts - audio_first_dts;
ZM_DUMP_STREAM_PACKET(audio_in_stream, (*ipkt), "after pts adjustment");
av_packet_rescale_ts(&opkt, audio_in_stream->time_base, audio_out_stream->time_base);
ZM_DUMP_STREAM_PACKET(audio_out_stream, opkt, "after stream pts adjustment");
write_packet(&opkt, audio_out_stream);
zm_av_packet_unref(&opkt);
} // end if encoding or copying
return 0;
} // end int VideoStore::writeAudioFramePacket(AVPacket *ipkt)
int VideoStore::write_packet(AVPacket *pkt, AVStream *stream) {
pkt->pos = -1;
pkt->stream_index = stream->index;
if ( pkt->dts == AV_NOPTS_VALUE ) {
Debug(1, "undef dts, fixing by setting to stream cur_dts %" PRId64, stream->cur_dts);
pkt->dts = stream->cur_dts;
} else if ( pkt->dts < stream->cur_dts ) {
Debug(1, "non increasing dts, fixing. our dts %" PRId64 " stream cur_dts %" PRId64, pkt->dts, stream->cur_dts);
pkt->dts = stream->cur_dts;
}
if ( pkt->dts > pkt->pts ) {
Debug(1,
"pkt.dts(%" PRId64 ") must be <= pkt.pts(%" PRId64 ")."
"Decompression must happen before presentation.",
pkt->dts, pkt->pts);
pkt->pts = pkt->dts;
}
ZM_DUMP_STREAM_PACKET(stream, (*pkt), "finished pkt");
next_dts[stream->index] = pkt->dts + pkt->duration;
Debug(3, "next_dts for stream %d has become %" PRId64,
stream->index, next_dts[stream->index]);
int ret = av_interleaved_write_frame(oc, pkt);
if ( ret != 0 ) {
Error("Error writing packet: %s",
av_make_error_string(ret).c_str());
} else {
Debug(4, "Success writing packet");
}
return ret;
} // end int VideoStore::write_packet(AVPacket *pkt, AVStream *stream)
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