389 lines
14 KiB
C
389 lines
14 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file libschroedingerenc.c
|
|
* 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"
|
|
#include "libdirac_libschro.h"
|
|
#include "libschroedinger.h"
|
|
|
|
|
|
/** libschroedinger encoder private data */
|
|
typedef struct FfmpegSchroEncoderParams
|
|
{
|
|
/** 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;
|
|
|
|
/** queue storing encoded frames */
|
|
FfmpegDiracSchroQueue enc_frame_queue;
|
|
|
|
/** end of sequence signalled */
|
|
int eos_signalled;
|
|
|
|
/** end of sequence pulled */
|
|
int eos_pulled;
|
|
} FfmpegSchroEncoderParams;
|
|
|
|
/**
|
|
* Works out Schro-compatible chroma format.
|
|
*/
|
|
static int SetSchroChromaFormat(AVCodecContext *avccontext)
|
|
{
|
|
int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
|
|
sizeof(ffmpeg_schro_pixel_format_map[0]);
|
|
int idx;
|
|
|
|
FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
|
|
|
|
for (idx = 0; idx < num_formats; ++idx) {
|
|
if (ffmpeg_schro_pixel_format_map[idx].ff_pix_fmt ==
|
|
avccontext->pix_fmt) {
|
|
p_schro_params->format->chroma_format =
|
|
ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
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");
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int libschroedinger_encode_init(AVCodecContext *avccontext)
|
|
{
|
|
FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
|
|
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);
|
|
schro_video_format_set_std_video_format (p_schro_params->format, preset);
|
|
p_schro_params->format->width = avccontext->width;
|
|
p_schro_params->format->height = avccontext->height;
|
|
|
|
if (SetSchroChromaFormat(avccontext) == -1)
|
|
return -1;
|
|
|
|
if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
|
|
&p_schro_params->frame_format) == -1) {
|
|
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");
|
|
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;
|
|
|
|
if (avccontext->gop_size == 0){
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"gop_structure",
|
|
SCHRO_ENCODER_GOP_INTRA_ONLY);
|
|
}
|
|
else {
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"gop_structure",
|
|
SCHRO_ENCODER_GOP_BIREF);
|
|
avccontext->has_b_frames = 1;
|
|
}
|
|
|
|
/* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */
|
|
if (avccontext->flags & CODEC_FLAG_QSCALE) {
|
|
if (avccontext->global_quality == 0) {
|
|
/* lossless coding */
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"rate_control",
|
|
SCHRO_ENCODER_RATE_CONTROL_LOSSLESS);
|
|
} else {
|
|
int noise_threshold;
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"rate_control",
|
|
SCHRO_ENCODER_RATE_CONTROL_CONSTANT_NOISE_THRESHOLD);
|
|
|
|
noise_threshold = avccontext->global_quality/FF_QP2LAMBDA;
|
|
if (noise_threshold > 100)
|
|
noise_threshold = 100;
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"noise_threshold",
|
|
noise_threshold);
|
|
}
|
|
}
|
|
else {
|
|
schro_encoder_setting_set_double ( p_schro_params->encoder,
|
|
"rate_control",
|
|
SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE);
|
|
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"bitrate",
|
|
avccontext->bit_rate);
|
|
|
|
}
|
|
|
|
if (avccontext->flags & CODEC_FLAG_INTERLACED_ME) {
|
|
/* All material can be coded as interlaced or progressive
|
|
irrespective of the type of source material. */
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"interlaced_coding", 1);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
|
|
/* Hardcode motion vector precision to quarter pixel. */
|
|
schro_encoder_setting_set_double (p_schro_params->encoder,
|
|
"mv_precision", 2);
|
|
|
|
/* Set the encoder format. */
|
|
schro_encoder_set_video_format(p_schro_params->encoder,
|
|
p_schro_params->format);
|
|
|
|
/* Set the debug level. */
|
|
schro_debug_set_level (avccontext->debug);
|
|
|
|
schro_encoder_start (p_schro_params->encoder);
|
|
|
|
/* Initialize the encoded frame queue. */
|
|
ff_dirac_schro_queue_init (&p_schro_params->enc_frame_queue);
|
|
return 0 ;
|
|
}
|
|
|
|
static SchroFrame *libschroedinger_frame_from_data (AVCodecContext *avccontext,
|
|
void *in_data)
|
|
{
|
|
FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
|
|
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. */
|
|
in_frame = schro_frame_new_and_alloc (NULL,
|
|
p_schro_params->frame_format,
|
|
p_schro_params->format->width,
|
|
p_schro_params->format->height);
|
|
|
|
avpicture_layout ((AVPicture *)in_data, avccontext->pix_fmt,
|
|
avccontext->width, avccontext->height,
|
|
in_frame->components[0].data,
|
|
p_schro_params->frame_size);
|
|
|
|
return in_frame;
|
|
}
|
|
|
|
static void SchroedingerFreeFrame(void *data)
|
|
{
|
|
FfmpegDiracSchroEncodedFrame *enc_frame = data;
|
|
|
|
av_freep (&(enc_frame->p_encbuf));
|
|
av_free(enc_frame);
|
|
}
|
|
|
|
static int libschroedinger_encode_frame(AVCodecContext *avccontext,
|
|
unsigned char *frame,
|
|
int buf_size, void *data)
|
|
{
|
|
int enc_size = 0;
|
|
FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
|
|
SchroEncoder *encoder = p_schro_params->encoder;
|
|
struct FfmpegDiracSchroEncodedFrame* p_frame_output = NULL;
|
|
int go = 1;
|
|
SchroBuffer *enc_buf;
|
|
int presentation_frame;
|
|
int parse_code;
|
|
|
|
if(data == NULL) {
|
|
/* 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. */
|
|
SchroFrame *in_frame = libschroedinger_frame_from_data (avccontext,
|
|
data);
|
|
/* 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) {
|
|
SchroStateEnum state;
|
|
state = schro_encoder_wait(encoder);
|
|
switch (state)
|
|
{
|
|
case SCHRO_STATE_HAVE_BUFFER:
|
|
case SCHRO_STATE_END_OF_STREAM:
|
|
enc_buf = schro_encoder_pull (encoder,
|
|
&presentation_frame);
|
|
assert (enc_buf->length > 0);
|
|
assert (enc_buf->length <= buf_size);
|
|
|
|
/* Create output frame. */
|
|
p_frame_output = av_mallocz(sizeof(FfmpegDiracSchroEncodedFrame));
|
|
/* Set output data. */
|
|
p_frame_output->size = enc_buf->length;
|
|
p_frame_output->p_encbuf = av_malloc(enc_buf->length);
|
|
memcpy(p_frame_output->p_encbuf, enc_buf->data, enc_buf->length);
|
|
|
|
parse_code = enc_buf->data[4];
|
|
if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) &&
|
|
SCHRO_PARSE_CODE_IS_REFERENCE(parse_code)) {
|
|
p_frame_output->key_frame = 1;
|
|
}
|
|
|
|
/* Parse the coded frame number from the bitstream. Bytes 14
|
|
* through 17 represesent the frame number. */
|
|
if (SCHRO_PARSE_CODE_IS_PICTURE(parse_code))
|
|
{
|
|
assert (enc_buf->length >= 17);
|
|
p_frame_output->frame_num = (enc_buf->data[13] << 24) +
|
|
(enc_buf->data[14] << 16) +
|
|
(enc_buf->data[15] << 8) +
|
|
enc_buf->data[16];
|
|
}
|
|
|
|
ff_dirac_schro_queue_push_back (&p_schro_params->enc_frame_queue,
|
|
p_frame_output);
|
|
schro_buffer_unref (enc_buf);
|
|
|
|
if (state == SCHRO_STATE_END_OF_STREAM) {
|
|
p_schro_params->eos_pulled = 1;
|
|
go = 0;
|
|
}
|
|
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. */
|
|
p_frame_output =
|
|
ff_dirac_schro_queue_pop (&p_schro_params->enc_frame_queue);
|
|
|
|
if (p_frame_output == NULL)
|
|
return 0;
|
|
|
|
memcpy(frame, p_frame_output->p_encbuf, p_frame_output->size);
|
|
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. */
|
|
avccontext->coded_frame->pts = p_frame_output->frame_num;
|
|
enc_size = p_frame_output->size;
|
|
|
|
/* free frame */
|
|
SchroedingerFreeFrame (p_frame_output);
|
|
|
|
return enc_size;
|
|
}
|
|
|
|
|
|
static int libschroedinger_encode_close(AVCodecContext *avccontext)
|
|
{
|
|
|
|
FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
|
|
|
|
/* Close the encoder. */
|
|
schro_encoder_free(p_schro_params->encoder);
|
|
|
|
/* Free data in the output frame queue. */
|
|
ff_dirac_schro_queue_free (&p_schro_params->enc_frame_queue,
|
|
SchroedingerFreeFrame);
|
|
|
|
/* Free the video format structure. */
|
|
av_freep(&p_schro_params->format);
|
|
|
|
return 0 ;
|
|
}
|
|
|
|
|
|
AVCodec libschroedinger_encoder = {
|
|
"libschroedinger",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_DIRAC,
|
|
sizeof(FfmpegSchroEncoderParams),
|
|
libschroedinger_encode_init,
|
|
libschroedinger_encode_frame,
|
|
libschroedinger_encode_close,
|
|
.capabilities= CODEC_CAP_DELAY,
|
|
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_NONE},
|
|
.long_name= NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"),
|
|
};
|