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swscale is a problem. When to use alignment/padding? Defaulting to alignment=1 makes libvnc work, but is less performant. Some scale operations require padding.

This commit is contained in:
Isaac Connor 2021-02-24 10:10:34 -05:00
parent 3ce0564e9c
commit c8abeddc9c
1 changed files with 15 additions and 12 deletions
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27
src/zm_swscale.cpp
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@ -159,21 +159,24 @@ int SWScale::Convert(
}
#endif
int alignment = 1;
/* Check the buffer sizes */
size_t insize = GetBufferSize(in_pf, width, height);
if ( insize > in_buffer_size ) {
Debug(1, "The input buffer size does not match the expected size for the input format. Required: %d for %dx%d %d Available: %d", insize, width, height, in_pf, in_buffer_size);
size_t needed_insize = GetBufferSize(in_pf, width, height);
if ( needed_insize > in_buffer_size ) {
Debug(1, "The input buffer size does not match the expected size for the input format. Required: %d for %dx%d %d Available: %d",
needed_insize, width, height, in_pf, in_buffer_size);
}
size_t outsize = GetBufferSize(out_pf, new_width, new_height);
if ( outsize > out_buffer_size ) {
Error("The output buffer is undersized for the output format. Required: %d Available: %d", outsize, out_buffer_size);
size_t needed_outsize = GetBufferSize(out_pf, new_width, new_height);
if ( needed_outsize > out_buffer_size ) {
Error("The output buffer is undersized for the output format. Required: %d Available: %d", needed_outsize, out_buffer_size);
return -5;
}
/* Get the context */
swscale_ctx = sws_getCachedContext(
swscale_ctx, width, height, in_pf, new_width, new_height,
out_pf, SWS_FAST_BILINEAR, nullptr, nullptr, nullptr);
swscale_ctx = sws_getCachedContext(swscale_ctx,
width, height, in_pf,
new_width, new_height, out_pf,
SWS_FAST_BILINEAR, nullptr, nullptr, nullptr);
if ( swscale_ctx == nullptr ) {
Error("Failed getting swscale context");
return -6;
@ -182,7 +185,7 @@ int SWScale::Convert(
/* Fill in the buffers */
#if LIBAVUTIL_VERSION_CHECK(54, 6, 0, 6, 0)
if (av_image_fill_arrays(input_avframe->data, input_avframe->linesize,
(uint8_t*) in_buffer, in_pf, width, height, 32) <= 0) {
(uint8_t*) in_buffer, in_pf, width, height, alignment) <= 0) {
#else
if (avpicture_fill((AVPicture*) input_avframe, (uint8_t*) in_buffer,
in_pf, width, height) <= 0) {
@ -192,7 +195,7 @@ int SWScale::Convert(
}
#if LIBAVUTIL_VERSION_CHECK(54, 6, 0, 6, 0)
if (av_image_fill_arrays(output_avframe->data, output_avframe->linesize,
out_buffer, out_pf, new_width, new_height, 32) <= 0) {
out_buffer, out_pf, new_width, new_height, alignment) <= 0) {
#else
if (avpicture_fill((AVPicture*) output_avframe, out_buffer, out_pf, new_width,
new_height) <= 0) {
@ -268,7 +271,7 @@ int SWScale::ConvertDefaults(const uint8_t* in_buffer, const size_t in_buffer_si
size_t SWScale::GetBufferSize(enum _AVPIXELFORMAT pf, unsigned int width, unsigned int height) {
#if LIBAVUTIL_VERSION_CHECK(54, 6, 0, 6, 0)
return av_image_get_buffer_size(pf, width, height, 32);
return av_image_get_buffer_size(pf, width, height, 1);
#else
return outsize = avpicture_get_size(pf, width,height);
#endif