220 lines
6.7 KiB
C++
220 lines
6.7 KiB
C++
/*
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* ZoneMinder FFMPEG implementation, $Date$, $Revision$
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* Copyright (C) 2001-2008 Philip Coombes
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "zm_ffmpeg.h"
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#include "zm_image.h"
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#include "zm_rgb.h"
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#if HAVE_LIBAVCODEC || HAVE_LIBAVUTIL || HAVE_LIBSWSCALE
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#if HAVE_LIBAVUTIL
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enum PixelFormat GetFFMPEGPixelFormat(unsigned int p_colours, unsigned p_subpixelorder) {
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enum PixelFormat pf;
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Debug(8,"Colours: %d SubpixelOrder: %d",p_colours,p_subpixelorder);
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switch(p_colours) {
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case ZM_COLOUR_RGB24:
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{
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if(p_subpixelorder == ZM_SUBPIX_ORDER_BGR) {
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/* BGR subpixel order */
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pf = PIX_FMT_BGR24;
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} else {
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/* Assume RGB subpixel order */
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pf = PIX_FMT_RGB24;
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}
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break;
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}
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case ZM_COLOUR_RGB32:
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{
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if(p_subpixelorder == ZM_SUBPIX_ORDER_ARGB) {
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/* ARGB subpixel order */
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pf = PIX_FMT_ARGB;
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} else if(p_subpixelorder == ZM_SUBPIX_ORDER_ABGR) {
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/* ABGR subpixel order */
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pf = PIX_FMT_ABGR;
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} else if(p_subpixelorder == ZM_SUBPIX_ORDER_BGRA) {
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/* BGRA subpixel order */
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pf = PIX_FMT_BGRA;
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} else {
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/* Assume RGBA subpixel order */
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pf = PIX_FMT_RGBA;
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}
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break;
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}
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case ZM_COLOUR_GRAY8:
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pf = PIX_FMT_GRAY8;
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break;
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default:
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Panic("Unexpected colours: %d",p_colours);
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pf = PIX_FMT_GRAY8; /* Just to shush gcc variable may be unused warning */
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break;
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}
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return pf;
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}
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#endif // HAVE_LIBAVUTIL
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#if HAVE_LIBSWSCALE && HAVE_LIBAVUTIL
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SWScale::SWScale() : gotdefaults(false), swscale_ctx(NULL), input_avframe(NULL), output_avframe(NULL) {
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Debug(4,"SWScale object created");
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/* Allocate AVFrame for the input */
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input_avframe = avcodec_alloc_frame();
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if(input_avframe == NULL) {
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Fatal("Failed allocating AVFrame for the input");
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}
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/* Allocate AVFrame for the output */
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output_avframe = avcodec_alloc_frame();
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if(output_avframe == NULL) {
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Fatal("Failed allocating AVFrame for the output");
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}
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}
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SWScale::~SWScale() {
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/* Free up everything */
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av_free(input_avframe);
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input_avframe = NULL;
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av_free(output_avframe);
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output_avframe = NULL;
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if(swscale_ctx) {
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sws_freeContext(swscale_ctx);
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swscale_ctx = NULL;
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}
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Debug(4,"SWScale object destroyed");
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}
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int SWScale::SetDefaults(enum PixelFormat in_pf, enum PixelFormat out_pf, unsigned int width, unsigned int height) {
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/* Assign the defaults */
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default_input_pf = in_pf;
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default_output_pf = out_pf;
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default_width = width;
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default_height = height;
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gotdefaults = true;
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return 0;
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}
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int SWScale::Convert(const uint8_t* in_buffer, const size_t in_buffer_size, uint8_t* out_buffer, const size_t out_buffer_size, enum PixelFormat in_pf, enum PixelFormat out_pf, unsigned int width, unsigned int height) {
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/* Parameter checking */
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if(in_buffer == NULL || out_buffer == NULL) {
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Error("NULL Input or output buffer");
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return -1;
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}
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if(in_pf == 0 || out_pf == 0) {
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Error("Invalid input or output pixel formats");
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return -2;
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}
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if(!width || !height) {
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Error("Invalid width or height");
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return -3;
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}
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#if LIBSWSCALE_VERSION_INT >= AV_VERSION_INT(0, 8, 0)
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/* Warn if the input or output pixelformat is not supported */
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if(!sws_isSupportedInput(in_pf)) {
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Warning("swscale does not support the input format: %c%c%c%c",(in_pf)&0xff,((in_pf)&0xff),((in_pf>>16)&0xff),((in_pf>>24)&0xff));
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}
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if(!sws_isSupportedOutput(out_pf)) {
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Warning("swscale does not support the output format: %c%c%c%c",(out_pf)&0xff,((out_pf>>8)&0xff),((out_pf>>16)&0xff),((out_pf>>24)&0xff));
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}
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#endif
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/* Check the buffer sizes */
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size_t insize = avpicture_get_size(in_pf, width, height);
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if(insize != in_buffer_size) {
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Error("The input buffer size does not match the expected size for the input format. Required: %d Available: %d", insize, in_buffer_size);
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return -4;
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}
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size_t outsize = avpicture_get_size(out_pf, width, height);
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if(outsize < out_buffer_size) {
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Error("The output buffer is undersized for the output format. Required: %d Available: %d", outsize, out_buffer_size);
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return -5;
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}
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/* Get the context */
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swscale_ctx = sws_getCachedContext( NULL, width, height, in_pf, width, height, out_pf, 0, NULL, NULL, NULL );
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if(swscale_ctx == NULL) {
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Error("Failed getting swscale context");
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return -6;
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}
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/* Fill in the buffers */
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if(!avpicture_fill( (AVPicture*)input_avframe, (uint8_t*)in_buffer, in_pf, width, height ) ) {
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Error("Failed filling input frame with input buffer");
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return -7;
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}
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if(!avpicture_fill( (AVPicture*)output_avframe, out_buffer, out_pf, width, height ) ) {
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Error("Failed filling output frame with output buffer");
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return -8;
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}
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/* Do the conversion */
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if(!sws_scale(swscale_ctx, input_avframe->data, input_avframe->linesize, 0, height, output_avframe->data, output_avframe->linesize ) ) {
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Error("swscale conversion failed");
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return -10;
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}
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return 0;
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}
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int SWScale::Convert(const Image* img, uint8_t* out_buffer, const size_t out_buffer_size, enum PixelFormat in_pf, enum PixelFormat out_pf, unsigned int width, unsigned int height) {
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if(img->Width() != width) {
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Error("Source image width differs. Source: %d Output: %d",img->Width(), width);
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return -12;
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}
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if(img->Height() != height) {
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Error("Source image height differs. Source: %d Output: %d",img->Height(), height);
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return -13;
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}
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return Convert(img->Buffer(),img->Size(),out_buffer,out_buffer_size,in_pf,out_pf,width,height);
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}
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int SWScale::ConvertDefaults(const Image* img, uint8_t* out_buffer, const size_t out_buffer_size) {
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if(!gotdefaults) {
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Error("Defaults are not set");
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return -24;
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}
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return Convert(img,out_buffer,out_buffer_size,default_input_pf,default_output_pf,default_width,default_height);
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}
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int SWScale::ConvertDefaults(const uint8_t* in_buffer, const size_t in_buffer_size, uint8_t* out_buffer, const size_t out_buffer_size) {
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if(!gotdefaults) {
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Error("Defaults are not set");
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return -24;
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}
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return Convert(in_buffer,in_buffer_size,out_buffer,out_buffer_size,default_input_pf,default_output_pf,default_width,default_height);
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}
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#endif // HAVE_LIBSWSCALE && HAVE_LIBAVUTIL
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#endif // HAVE_LIBAVCODEC || HAVE_LIBAVUTIL || HAVE_LIBSWSCALE
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