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/*
* Dirac encoder support via Schroedinger libraries
* Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/** |
ba87f080 |
* @file |
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* Dirac encoder support via libschroedinger-1.0 libraries. More details about
* the Schroedinger project can be found at http://www.diracvideo.org/.
* The library implements Dirac Specification Version 2.2
* (http://dirac.sourceforge.net/specification.html).
*/
#undef NDEBUG
#include <assert.h>
#include <schroedinger/schro.h>
#include <schroedinger/schrodebug.h>
#include <schroedinger/schrovideoformat.h>
#include "avcodec.h" |
df53a473 |
#include "internal.h" |
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#include "libschroedinger.h" |
37284120 |
#include "bytestream.h" |
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/** libschroedinger encoder private data */ |
45235d69 |
typedef struct SchroEncoderParams { |
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/** Schroedinger video format */
SchroVideoFormat *format;
/** Schroedinger frame format */
SchroFrameFormat frame_format;
/** frame being encoded */
AVFrame picture;
/** frame size */
int frame_size;
/** Schroedinger encoder handle*/
SchroEncoder* encoder;
|
007f67b0 |
/** buffer to store encoder output before writing it to the frame queue*/
unsigned char *enc_buf;
/** Size of encoder buffer*/
int enc_buf_size;
|
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/** queue storing encoded frames */ |
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FFSchroQueue enc_frame_queue; |
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/** end of sequence signalled */
int eos_signalled;
/** end of sequence pulled */
int eos_pulled; |
df53a473 |
/* counter for frames submitted to encoder, used as dts */
int64_t dts; |
45235d69 |
} SchroEncoderParams; |
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/**
* Works out Schro-compatible chroma format.
*/ |
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static int set_chroma_format(AVCodecContext *avccontext) |
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{ |
45235d69 |
int num_formats = sizeof(schro_pixel_format_map) /
sizeof(schro_pixel_format_map[0]); |
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int idx;
|
45235d69 |
SchroEncoderParams *p_schro_params = avccontext->priv_data; |
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for (idx = 0; idx < num_formats; ++idx) { |
45235d69 |
if (schro_pixel_format_map[idx].ff_pix_fmt == |
0ebe3b8e |
avccontext->pix_fmt) { |
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p_schro_params->format->chroma_format = |
45235d69 |
schro_pixel_format_map[idx].schro_pix_fmt; |
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return 0;
}
}
|
0ebe3b8e |
av_log(avccontext, AV_LOG_ERROR,
"This codec currently only supports planar YUV 4:2:0, 4:2:2"
" and 4:4:4 formats.\n"); |
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return -1;
}
static int libschroedinger_encode_init(AVCodecContext *avccontext)
{ |
45235d69 |
SchroEncoderParams *p_schro_params = avccontext->priv_data; |
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SchroVideoFormatEnum preset;
/* Initialize the libraries that libschroedinger depends on. */
schro_init();
/* Create an encoder object. */
p_schro_params->encoder = schro_encoder_new();
if (!p_schro_params->encoder) {
av_log(avccontext, AV_LOG_ERROR,
"Unrecoverable Error: schro_encoder_new failed. ");
return -1;
}
/* Initialize the format. */
preset = ff_get_schro_video_format_preset(avccontext);
p_schro_params->format =
schro_encoder_get_video_format(p_schro_params->encoder); |
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schro_video_format_set_std_video_format(p_schro_params->format, preset);
p_schro_params->format->width = avccontext->width; |
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p_schro_params->format->height = avccontext->height;
|
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if (set_chroma_format(avccontext) == -1) |
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return -1;
|
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if (avccontext->color_primaries == AVCOL_PRI_BT709) {
p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV;
} else if (avccontext->color_primaries == AVCOL_PRI_BT470BG) {
p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625;
} else if (avccontext->color_primaries == AVCOL_PRI_SMPTE170M) {
p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525;
}
if (avccontext->colorspace == AVCOL_SPC_BT709) {
p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV;
} else if (avccontext->colorspace == AVCOL_SPC_BT470BG) {
p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV;
}
if (avccontext->color_trc == AVCOL_TRC_BT709) {
p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA;
}
|
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if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
&p_schro_params->frame_format) == -1) { |
0ebe3b8e |
av_log(avccontext, AV_LOG_ERROR,
"This codec currently supports only planar YUV 4:2:0, 4:2:2"
" and 4:4:4 formats.\n"); |
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return -1;
}
p_schro_params->format->frame_rate_numerator = avccontext->time_base.den;
p_schro_params->format->frame_rate_denominator = avccontext->time_base.num;
p_schro_params->frame_size = avpicture_get_size(avccontext->pix_fmt,
avccontext->width,
avccontext->height);
avccontext->coded_frame = &p_schro_params->picture;
|
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if (!avccontext->gop_size) { |
0ebe3b8e |
schro_encoder_setting_set_double(p_schro_params->encoder,
"gop_structure",
SCHRO_ENCODER_GOP_INTRA_ONLY); |
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|
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if (avccontext->coder_type == FF_CODER_TYPE_VLC) |
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schro_encoder_setting_set_double(p_schro_params->encoder,
"enable_noarith", 1);
} else { |
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schro_encoder_setting_set_double(p_schro_params->encoder,
"au_distance", avccontext->gop_size); |
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avccontext->has_b_frames = 1; |
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p_schro_params->dts = -1; |
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}
/* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */
if (avccontext->flags & CODEC_FLAG_QSCALE) { |
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if (!avccontext->global_quality) { |
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/* lossless coding */ |
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schro_encoder_setting_set_double(p_schro_params->encoder,
"rate_control",
SCHRO_ENCODER_RATE_CONTROL_LOSSLESS); |
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} else { |
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int quality; |
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schro_encoder_setting_set_double(p_schro_params->encoder,
"rate_control", |
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SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY); |
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|
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quality = avccontext->global_quality / FF_QP2LAMBDA;
if (quality > 10)
quality = 10; |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"quality", quality); |
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} |
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} else {
schro_encoder_setting_set_double(p_schro_params->encoder,
"rate_control",
SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE); |
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|
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schro_encoder_setting_set_double(p_schro_params->encoder,
"bitrate",
avccontext->bit_rate); |
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}
|
735a3804 |
if (avccontext->flags & CODEC_FLAG_INTERLACED_ME) |
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/* All material can be coded as interlaced or progressive
irrespective of the type of source material. */ |
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schro_encoder_setting_set_double(p_schro_params->encoder,
"interlaced_coding", 1); |
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|
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schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop",
!(avccontext->flags & CODEC_FLAG_CLOSED_GOP));
|
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/* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger
* and libdirac support other bit-depth data. */
schro_video_format_set_std_signal_range(p_schro_params->format,
SCHRO_SIGNAL_RANGE_8BIT_VIDEO);
/* Set the encoder format. */
schro_encoder_set_video_format(p_schro_params->encoder,
p_schro_params->format);
/* Set the debug level. */ |
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schro_debug_set_level(avccontext->debug); |
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|
0ebe3b8e |
schro_encoder_start(p_schro_params->encoder); |
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/* Initialize the encoded frame queue. */ |
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ff_schro_queue_init(&p_schro_params->enc_frame_queue); |
0ebe3b8e |
return 0; |
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}
|
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static SchroFrame *libschroedinger_frame_from_data(AVCodecContext *avccontext, |
df53a473 |
const AVFrame *frame) |
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{ |
45235d69 |
SchroEncoderParams *p_schro_params = avccontext->priv_data; |
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SchroFrame *in_frame;
/* Input line size may differ from what the codec supports. Especially
* when transcoding from one format to another. So use avpicture_layout
* to copy the frame. */ |
d15f2e00 |
in_frame = ff_create_schro_frame(avccontext, p_schro_params->frame_format);
if (in_frame) |
df53a473 |
avpicture_layout((const AVPicture *)frame, avccontext->pix_fmt, |
d15f2e00 |
avccontext->width, avccontext->height,
in_frame->components[0].data,
p_schro_params->frame_size); |
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return in_frame;
}
|
fdc91863 |
static void libschroedinger_free_frame(void *data) |
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{ |
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FFSchroEncodedFrame *enc_frame = data; |
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|
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av_freep(&enc_frame->p_encbuf); |
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av_free(enc_frame);
}
|
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static int libschroedinger_encode_frame(AVCodecContext *avccontext, AVPacket *pkt,
const AVFrame *frame, int *got_packet) |
f7cd9eed |
{
int enc_size = 0; |
45235d69 |
SchroEncoderParams *p_schro_params = avccontext->priv_data; |
f7cd9eed |
SchroEncoder *encoder = p_schro_params->encoder; |
9cef0669 |
struct FFSchroEncodedFrame *p_frame_output = NULL; |
f7cd9eed |
int go = 1;
SchroBuffer *enc_buf;
int presentation_frame;
int parse_code; |
007f67b0 |
int last_frame_in_sequence = 0; |
df53a473 |
int pkt_size, ret; |
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|
df53a473 |
if (!frame) { |
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/* Push end of sequence if not already signalled. */
if (!p_schro_params->eos_signalled) {
schro_encoder_end_of_stream(encoder);
p_schro_params->eos_signalled = 1;
}
} else {
/* Allocate frame data to schro input buffer. */ |
0ebe3b8e |
SchroFrame *in_frame = libschroedinger_frame_from_data(avccontext, |
df53a473 |
frame); |
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/* Load next frame. */
schro_encoder_push_frame(encoder, in_frame);
}
if (p_schro_params->eos_pulled)
go = 0;
/* Now check to see if we have any output from the encoder. */
while (go) { |
0ebe3b8e |
SchroStateEnum state; |
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state = schro_encoder_wait(encoder); |
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switch (state) { |
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case SCHRO_STATE_HAVE_BUFFER:
case SCHRO_STATE_END_OF_STREAM: |
0ebe3b8e |
enc_buf = schro_encoder_pull(encoder, &presentation_frame);
assert(enc_buf->length > 0);
assert(enc_buf->length <= buf_size); |
007f67b0 |
parse_code = enc_buf->data[4];
/* All non-frame data is prepended to actual frame data to
* be able to set the pts correctly. So we don't write data
* to the frame output queue until we actually have a frame
*/ |
0ebe3b8e |
p_schro_params->enc_buf = av_realloc(p_schro_params->enc_buf,
p_schro_params->enc_buf_size + enc_buf->length); |
007f67b0 |
|
0ebe3b8e |
memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size, |
007f67b0 |
enc_buf->data, enc_buf->length);
p_schro_params->enc_buf_size += enc_buf->length;
if (state == SCHRO_STATE_END_OF_STREAM) {
p_schro_params->eos_pulled = 1;
go = 0;
}
if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) { |
0ebe3b8e |
schro_buffer_unref(enc_buf); |
007f67b0 |
break;
} |
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/* Create output frame. */ |
9cef0669 |
p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame)); |
f7cd9eed |
/* Set output data. */ |
007f67b0 |
p_frame_output->size = p_schro_params->enc_buf_size;
p_frame_output->p_encbuf = p_schro_params->enc_buf; |
f7cd9eed |
if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) && |
735a3804 |
SCHRO_PARSE_CODE_IS_REFERENCE(parse_code)) |
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p_frame_output->key_frame = 1;
/* Parse the coded frame number from the bitstream. Bytes 14
* through 17 represesent the frame number. */ |
37284120 |
p_frame_output->frame_num = AV_RB32(enc_buf->data + 13); |
f7cd9eed |
|
9cef0669 |
ff_schro_queue_push_back(&p_schro_params->enc_frame_queue,
p_frame_output); |
007f67b0 |
p_schro_params->enc_buf_size = 0;
p_schro_params->enc_buf = NULL;
|
0ebe3b8e |
schro_buffer_unref(enc_buf); |
f7cd9eed |
break;
case SCHRO_STATE_NEED_FRAME:
go = 0;
break;
case SCHRO_STATE_AGAIN:
break;
default:
av_log(avccontext, AV_LOG_ERROR, "Unknown Schro Encoder state\n");
return -1;
}
}
/* Copy 'next' frame in queue. */ |
007f67b0 |
if (p_schro_params->enc_frame_queue.size == 1 &&
p_schro_params->eos_pulled)
last_frame_in_sequence = 1;
|
9cef0669 |
p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue); |
f7cd9eed |
|
7c809dc3 |
if (!p_frame_output) |
f7cd9eed |
return 0;
|
df53a473 |
pkt_size = p_frame_output->size;
if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0)
pkt_size += p_schro_params->enc_buf_size; |
ae2c33b0 |
if ((ret = ff_alloc_packet2(avccontext, pkt, pkt_size)) < 0) |
df53a473 |
goto error;
memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size); |
f7cd9eed |
avccontext->coded_frame->key_frame = p_frame_output->key_frame;
/* Use the frame number of the encoded frame as the pts. It is OK to
* do so since Dirac is a constant frame rate codec. It expects input
* to be of constant frame rate. */ |
df53a473 |
pkt->pts = |
f7cd9eed |
avccontext->coded_frame->pts = p_frame_output->frame_num; |
df53a473 |
pkt->dts = p_schro_params->dts++; |
f7cd9eed |
enc_size = p_frame_output->size;
|
007f67b0 |
/* Append the end of sequence information to the last frame in the
* sequence. */ |
0ebe3b8e |
if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) { |
df53a473 |
memcpy(pkt->data + enc_size, p_schro_params->enc_buf, |
0ebe3b8e |
p_schro_params->enc_buf_size); |
007f67b0 |
enc_size += p_schro_params->enc_buf_size; |
0ebe3b8e |
av_freep(&p_schro_params->enc_buf); |
007f67b0 |
p_schro_params->enc_buf_size = 0;
}
|
df53a473 |
if (p_frame_output->key_frame)
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
error: |
f7cd9eed |
/* free frame */ |
fdc91863 |
libschroedinger_free_frame(p_frame_output); |
df53a473 |
return ret; |
f7cd9eed |
}
static int libschroedinger_encode_close(AVCodecContext *avccontext)
{ |
45235d69 |
SchroEncoderParams *p_schro_params = avccontext->priv_data; |
f7cd9eed |
|
0ebe3b8e |
/* Close the encoder. */ |
f7cd9eed |
schro_encoder_free(p_schro_params->encoder);
/* Free data in the output frame queue. */ |
9cef0669 |
ff_schro_queue_free(&p_schro_params->enc_frame_queue, |
fdc91863 |
libschroedinger_free_frame); |
f7cd9eed |
|
007f67b0 |
/* Free the encoder buffer. */
if (p_schro_params->enc_buf_size)
av_freep(&p_schro_params->enc_buf);
|
f7cd9eed |
/* Free the video format structure. */
av_freep(&p_schro_params->format);
|
0ebe3b8e |
return 0; |
f7cd9eed |
}
|
e7e2df27 |
AVCodec ff_libschroedinger_encoder = { |
ec6402b7 |
.name = "libschroedinger",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_DIRAC, |
45235d69 |
.priv_data_size = sizeof(SchroEncoderParams), |
ec6402b7 |
.init = libschroedinger_encode_init, |
df53a473 |
.encode2 = libschroedinger_encode_frame, |
ec6402b7 |
.close = libschroedinger_encode_close, |
00c3b67b |
.capabilities = CODEC_CAP_DELAY,
.pix_fmts = (const enum PixelFormat[]){
PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_NONE
},
.long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"), |
f7cd9eed |
}; |