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ffmpeg: Don't require a known device to pass a frames context to an encoder

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The previous code here did not handle passing a frames context when
ffmpeg itself did not know about the device it came from (for example,
because it was created by device derivation inside a filter graph), which
would break encoders requiring that input.  Fix that by checking for HW
frames and device context methods independently, and prefer to use a
frames context method if possible.  At the same time, revert the encoding
additions to the device matching function because the additional
complexity was not relevant to decoding.

Also fixes #8637, which is the same case but with the device creation
hidden in the ad-hoc libmfx setup code.
This commit is contained in:
Mark Thompson 2020-04-28 23:56:42 +01:00
parent 1a9684c08a
commit 706ed34ce7
1 changed files with 42 additions and 33 deletions
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75
fftools/ffmpeg_hw.c
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@ -19,6 +19,7 @@
#include <string.h>
#include "libavutil/avstring.h"
#include "libavutil/pixdesc.h"
#include "libavfilter/buffersink.h"
#include "ffmpeg.h"
@ -282,10 +283,7 @@ void hw_device_free_all(void)
nb_hw_devices = 0;
}
static HWDevice *hw_device_match_by_codec(const AVCodec *codec,
enum AVPixelFormat format,
int possible_methods,
int *matched_methods)
static HWDevice *hw_device_match_by_codec(const AVCodec *codec)
{
const AVCodecHWConfig *config;
HWDevice *dev;
@ -294,18 +292,11 @@ static HWDevice *hw_device_match_by_codec(const AVCodec *codec,
config = avcodec_get_hw_config(codec, i);
if (!config)
return NULL;
if (format != AV_PIX_FMT_NONE &&
config->pix_fmt != AV_PIX_FMT_NONE &&
config->pix_fmt != format)
continue;
if (!(config->methods & possible_methods))
if (!(config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
continue;
dev = hw_device_get_by_type(config->device_type);
if (dev) {
if (matched_methods)
*matched_methods = config->methods & possible_methods;
if (dev)
return dev;
}
}
}
@ -351,9 +342,7 @@ 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, AV_PIX_FMT_NONE,
AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX,
NULL);
dev = hw_device_match_by_codec(ist->dec);
if (!dev) {
// No device for this codec, but not using generic hwaccel
// and therefore may well not need one - ignore.
@ -429,37 +418,57 @@ 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;
const AVCodecHWConfig *config;
HWDevice *dev = NULL;
AVBufferRef *frames_ref = NULL;
int i;
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;
ost->enc_ctx->pix_fmt) {
// Matching format, will try to use hw_frames_ctx.
} else {
frames_ref = NULL;
}
}
dev = hw_device_match_by_codec(ost->enc, ost->enc_ctx->pix_fmt,
methods, &matched_methods);
if (dev) {
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) {
for (i = 0;; i++) {
config = avcodec_get_hw_config(ost->enc, i);
if (!config)
break;
if (frames_ref &&
config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
(config->pix_fmt == AV_PIX_FMT_NONE ||
config->pix_fmt == ost->enc_ctx->pix_fmt)) {
av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input "
"frames context (format %s) with %s encoder.\n",
av_get_pix_fmt_name(ost->enc_ctx->pix_fmt),
ost->enc->name);
ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref);
if (!ost->enc_ctx->hw_frames_ctx)
return AVERROR(ENOMEM);
return 0;
}
return 0;
if (!dev &&
config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)
dev = hw_device_get_by_type(config->device_type);
}
if (dev) {
av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s "
"(type %s) with %s encoder.\n", dev->name,
av_hwdevice_get_type_name(dev->type), ost->enc->name);
ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
if (!ost->enc_ctx->hw_device_ctx)
return AVERROR(ENOMEM);
} else {
// No device required, or no device available.
return 0;
}
return 0;
}
static int hwaccel_retrieve_data(AVCodecContext *avctx, AVFrame *input)