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Code Issues Releases Activity

ffmpeg: Use hardware config metadata with encoders

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This can support encoders which want frames and/or device contexts.  For
the device case, it currently picks the first initialised device of the
desired type to give to the encoder - a new option would be needed if it
were necessary to choose between multiple devices of the same type.
This commit is contained in:
Mark Thompson 2020-04-13 16:33:20 +01:00
parent e254212405
commit 8abd3b2028
2 changed files with 46 additions and 21 deletions
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19
fftools/ffmpeg.c
View File

@ -3476,21 +3476,14 @@ static int init_output_stream(OutputStream *ost, char *error, int error_len)
!av_dict_get(ost->encoder_opts, "ab", NULL, 0))
av_dict_set(&ost->encoder_opts, "b", "128000", 0);
if (ost->filter && av_buffersink_get_hw_frames_ctx(ost->filter->filter) &&
((AVHWFramesContext*)av_buffersink_get_hw_frames_ctx(ost->filter->filter)->data)->format ==
av_buffersink_get_format(ost->filter->filter)) {
ost->enc_ctx->hw_frames_ctx = av_buffer_ref(av_buffersink_get_hw_frames_ctx(ost->filter->filter));
if (!ost->enc_ctx->hw_frames_ctx)
return AVERROR(ENOMEM);
} else {
ret = hw_device_setup_for_encode(ost);
if (ret < 0) {
snprintf(error, error_len, "Device setup failed for "
"encoder on output stream #%d:%d : %s",
ret = hw_device_setup_for_encode(ost);
if (ret < 0) {
snprintf(error, error_len, "Device setup failed for "
"encoder on output stream #%d:%d : %s",
ost->file_index, ost->index, av_err2str(ret));
return ret;
}
return ret;
}
if (ist && ist->dec->type == AVMEDIA_TYPE_SUBTITLE && ost->enc->type == AVMEDIA_TYPE_SUBTITLE) {
int input_props = 0, output_props = 0;
AVCodecDescriptor const *input_descriptor =

48
fftools/ffmpeg_hw.c
View File

@ -19,6 +19,7 @@
#include <string.h>
#include "libavutil/avstring.h"
#include "libavfilter/buffersink.h"
#include "ffmpeg.h"
@ -281,7 +282,10 @@ void hw_device_free_all(void)
nb_hw_devices = 0;
}
static HWDevice *hw_device_match_by_codec(const AVCodec *codec)
static HWDevice *hw_device_match_by_codec(const AVCodec *codec,
enum AVPixelFormat format,
int possible_methods,
int *matched_methods)
{
const AVCodecHWConfig *config;
HWDevice *dev;
@ -290,11 +294,18 @@ static HWDevice *hw_device_match_by_codec(const AVCodec *codec)
config = avcodec_get_hw_config(codec, i);
if (!config)
return NULL;
if (!(config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
if (format != AV_PIX_FMT_NONE &&
config->pix_fmt != AV_PIX_FMT_NONE &&
config->pix_fmt != format)
continue;
if (!(config->methods & possible_methods))
continue;
dev = hw_device_get_by_type(config->device_type);
if (dev)
if (dev) {
if (matched_methods)
*matched_methods = config->methods & possible_methods;
return dev;
}
}
}
@ -340,7 +351,9 @@ int hw_device_setup_for_decode(InputStream *ist)
if (!dev)
err = hw_device_init_from_type(type, NULL, &dev);
} else {
dev = hw_device_match_by_codec(ist->dec);
dev = hw_device_match_by_codec(ist->dec, AV_PIX_FMT_NONE,
AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX,
NULL);
if (!dev) {
// No device for this codec, but not using generic hwaccel
// and therefore may well not need one - ignore.
@ -417,12 +430,31 @@ int hw_device_setup_for_decode(InputStream *ist)
int hw_device_setup_for_encode(OutputStream *ost)
{
HWDevice *dev;
AVBufferRef *frames_ref;
int methods = AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX;
int matched_methods;
dev = hw_device_match_by_codec(ost->enc);
if (ost->filter) {
frames_ref = av_buffersink_get_hw_frames_ctx(ost->filter->filter);
if (frames_ref &&
((AVHWFramesContext*)frames_ref->data)->format ==
ost->enc_ctx->pix_fmt)
methods |= AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX;
}
dev = hw_device_match_by_codec(ost->enc, ost->enc_ctx->pix_fmt,
methods, &matched_methods);
if (dev) {
ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
if (!ost->enc_ctx->hw_device_ctx)
return AVERROR(ENOMEM);
if (matched_methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX) {
ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
if (!ost->enc_ctx->hw_device_ctx)
return AVERROR(ENOMEM);
}
if (matched_methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX) {
ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref);
if (!ost->enc_ctx->hw_frames_ctx)
return AVERROR(ENOMEM);
}
return 0;
} else {
// No device required, or no device available.