falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
Browse Source

Add Dirac support through libschroedinger. 

patch by Anuradha Suraparaju, anuradha rd.bbc.co uk

Originally committed as revision 13046 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Anuradha Suraparaju Diego Biurrun 18 years ago
parent
34499963e3
commit
f7cd9eed5d
7 changed files with 848 additions and 0 deletions
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. +7
    -0
      configure
  2. +2
    -0
      libavcodec/Makefile
  3. +1
    -0
      libavcodec/allcodecs.c
  4. +80
    -0
      libavcodec/libschroedinger.c
  5. +61
    -0
      libavcodec/libschroedinger.h
  6. +310
    -0
      libavcodec/libschroedingerdec.c
  7. +387
    -0
      libavcodec/libschroedingerenc.c

+ 7
- 0
configure View File

@@ -98,6 +98,7 @@ show_help(){
echo " --enable-libmp3lame enable MP3 encoding via libmp3lame [default=no]"
echo " --enable-libnut enable NUT (de)muxing via libnut,"
echo " native demuxer exists [default=no]"
echo " --enable-libschroedinger enable Dirac support via libschroedinger [default=no]"
echo " --enable-libtheora enable Theora encoding via libtheora [default=no]"
echo " --enable-libvorbis enable Vorbis encoding via libvorbis,"
echo " native implementation exists [default=no]"
@@ -649,6 +650,7 @@ CONFIG_LIST="
libgsm
libmp3lame
libnut
libschroedinger
libtheora
libvorbis
libx264
@@ -834,6 +836,8 @@ libgsm_encoder_deps="libgsm"
libgsm_ms_decoder_deps="libgsm"
libgsm_ms_encoder_deps="libgsm"
libmp3lame_encoder_deps="libmp3lame"
libschroedinger_decoder_deps="libschroedinger"
libschroedinger_encoder_deps="libschroedinger"
libtheora_encoder_deps="libtheora"
libvorbis_encoder_deps="libvorbis"
libx264_encoder_deps="libx264"
@@ -1637,6 +1641,8 @@ enabled libfaad && require2 libfaad faad.h faacDecOpen -lfaad
enabled libgsm && require libgsm gsm.h gsm_create -lgsm
enabled libmp3lame && require LAME lame/lame.h lame_init -lmp3lame -lm
enabled libnut && require libnut libnut.h nut_demuxer_init -lnut
enabled libschroedinger && add_cflags $(pkg-config --cflags schroedinger-1.0) \
&& require libschroedinger schroedinger/schro.h schro_init -lschroedinger-1.0 -lpthread -loil-0.3 -lm -lrt
enabled libtheora && require libtheora theora/theora.h theora_info_init -ltheora -logg
enabled libvorbis && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
enabled libx264 && require x264 x264.h x264_encoder_open -lx264 -lm
@@ -1923,6 +1929,7 @@ echo "libfaad dlopened ${libfaadbin-no}"
echo "libgsm enabled ${libgsm-no}"
echo "libmp3lame enabled ${libmp3lame-no}"
echo "libnut enabled ${libnut-no}"
echo "libschroedinger enabled ${libschroedinger-no}"
echo "libtheora enabled ${libtheora-no}"
echo "libvorbis enabled ${libvorbis-no}"
echo "x264 enabled ${libx264-no}"


+ 2
- 0
libavcodec/Makefile View File

@@ -325,6 +325,8 @@ OBJS-$(CONFIG_LIBFAAC) += libfaac.o
OBJS-$(CONFIG_LIBFAAD) += libfaad.o
OBJS-$(CONFIG_LIBGSM) += libgsm.o
OBJS-$(CONFIG_LIBMP3LAME) += libmp3lame.o
OBJS-$(CONFIG_LIBSCHROEDINGER_DECODER) += libschroedingerdec.o libschroedinger.o libdirac_libschro.o
OBJS-$(CONFIG_LIBSCHROEDINGER_ENCODER) += libschroedingerenc.o libschroedinger.o libdirac_libschro.o
OBJS-$(CONFIG_LIBTHEORA) += libtheoraenc.o
OBJS-$(CONFIG_LIBVORBIS) += libvorbis.o
OBJS-$(CONFIG_LIBX264) += libx264.o


+ 1
- 0
libavcodec/allcodecs.c View File

@@ -283,6 +283,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (LIBGSM, libgsm);
REGISTER_ENCDEC (LIBGSM_MS, libgsm_ms);
REGISTER_ENCODER (LIBMP3LAME, libmp3lame);
REGISTER_ENCDEC (LIBSCHROEDINGER, libschroedinger);
REGISTER_ENCODER (LIBTHEORA, libtheora);
REGISTER_ENCODER (LIBVORBIS, libvorbis);
REGISTER_ENCODER (LIBX264, libx264);


+ 80
- 0
libavcodec/libschroedinger.c View File

@@ -0,0 +1,80 @@
/*
* 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 libschroedinger.c
* function definitions common to libschroedingerdec.c and libschroedingerenc.c
*/

#include "libdirac_libschro.h"
#include "libschroedinger.h"

/**
* Schroedinger video preset table. Ensure that this tables matches up correctly
* with the ff_dirac_schro_video_format_info table in libdirac_libschro.c.
*/
static const SchroVideoFormatEnum ff_schro_video_formats[]={
SCHRO_VIDEO_FORMAT_CUSTOM ,
SCHRO_VIDEO_FORMAT_QSIF ,
SCHRO_VIDEO_FORMAT_QCIF ,
SCHRO_VIDEO_FORMAT_SIF ,
SCHRO_VIDEO_FORMAT_CIF ,
SCHRO_VIDEO_FORMAT_4SIF ,
SCHRO_VIDEO_FORMAT_4CIF ,
SCHRO_VIDEO_FORMAT_SD480I_60 ,
SCHRO_VIDEO_FORMAT_SD576I_50 ,
SCHRO_VIDEO_FORMAT_HD720P_60 ,
SCHRO_VIDEO_FORMAT_HD720P_50 ,
SCHRO_VIDEO_FORMAT_HD1080I_60 ,
SCHRO_VIDEO_FORMAT_HD1080I_50 ,
SCHRO_VIDEO_FORMAT_HD1080P_60 ,
SCHRO_VIDEO_FORMAT_HD1080P_50 ,
SCHRO_VIDEO_FORMAT_DC2K_24 ,
SCHRO_VIDEO_FORMAT_DC4K_24 ,
};

SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avccontext)
{
unsigned int num_formats = sizeof(ff_schro_video_formats) /
sizeof(ff_schro_video_formats[0]);

unsigned int idx = ff_dirac_schro_get_video_format_idx (avccontext);

return (idx < num_formats) ?
ff_schro_video_formats[idx] : SCHRO_VIDEO_FORMAT_CUSTOM;
}

int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt,
SchroFrameFormat *schro_frame_fmt)
{
unsigned int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
sizeof(ffmpeg_schro_pixel_format_map[0]);

int idx;

for (idx = 0; idx < num_formats; ++idx) {
if (ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
*schro_frame_fmt =
ffmpeg_schro_pixel_format_map[idx].schro_frame_fmt;
return 0;
}
}
return -1;
}

+ 61
- 0
libavcodec/libschroedinger.h View File

@@ -0,0 +1,61 @@
/*
* 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 libschroedinger.h
* data structures common to libschroedingerdec.c and libschroedingerenc.c
*/

#ifndef FFMPEG_LIBSCHROEDINGER_H
#define FFMPEG_LIBSCHROEDINGER_H

#include "config.h"

#ifdef CONFIG_LIBSCHROEDINGER

#include <schroedinger/schrobitstream.h>
#include <schroedinger/schroframe.h>
#include "avcodec.h"

static const struct {
enum PixelFormat ff_pix_fmt;
SchroChromaFormat schro_pix_fmt;
SchroFrameFormat schro_frame_fmt;
} ffmpeg_schro_pixel_format_map[] = {
{ PIX_FMT_YUV420P, SCHRO_CHROMA_420, SCHRO_FRAME_FORMAT_U8_420 },
{ PIX_FMT_YUV422P, SCHRO_CHROMA_422, SCHRO_FRAME_FORMAT_U8_422 },
{ PIX_FMT_YUV444P, SCHRO_CHROMA_444, SCHRO_FRAME_FORMAT_U8_444 },
};

/**
* Returns the video format preset matching the input video dimensions and
* time base.
*/
SchroVideoFormatEnum ff_get_schro_video_format_preset (AVCodecContext *avccontext);

/**
* Sets the Schroedinger frame format corresponding to the Schro chroma format
* passed. Returns 0 on success, -1 on failure.
*/
int ff_get_schro_frame_format (SchroChromaFormat schro_chroma_fmt,
SchroFrameFormat *schro_frame_fmt);

#endif /* CONFIG_LIBSCHROEDINGER */
#endif /* FFMPEG_LIBSCHROEDINGER_H */

+ 310
- 0
libavcodec/libschroedingerdec.c View File

@@ -0,0 +1,310 @@
/*
* Dirac decoder 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 libschroedingerdec.c
* Dirac decoder 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).
*/

#include "avcodec.h"
#include "libdirac_libschro.h"
#include "libschroedinger.h"

#undef NDEBUG
#include <assert.h>


#include <schroedinger/schro.h>
#include <schroedinger/schrodebug.h>
#include <schroedinger/schrovideoformat.h>

/** libschroedinger decoder private data */
typedef struct FfmpegSchroDecoderParams
{
/** Schroedinger video format */
SchroVideoFormat *format;

/** Schroedinger frame format */
SchroFrameFormat frame_format;

/** decoder handle */
SchroDecoder* decoder;

/** queue storing decoded frames */
FfmpegDiracSchroQueue dec_frame_queue;

/** end of sequence signalled */
int eos_signalled;

/** end of sequence pulled */
int eos_pulled;

/** decoded picture */
AVPicture dec_pic;
} FfmpegSchroDecoderParams;

/**
* Returns FFmpeg chroma format.
*/
static enum PixelFormat GetFfmpegChromaFormat(SchroChromaFormat schro_pix_fmt)
{
int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
sizeof(ffmpeg_schro_pixel_format_map[0]);
int idx;

for (idx = 0; idx < num_formats; ++idx) {
if (ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
return ffmpeg_schro_pixel_format_map[idx].ff_pix_fmt;
}
}
return PIX_FMT_NONE;
}

/*-------------------------DECODER------------------------------------------*/

static int libschroedinger_decode_init(AVCodecContext *avccontext)
{

FfmpegSchroDecoderParams *p_schro_params = avccontext->priv_data ;
/* First of all, initialize our supporting libraries. */
schro_init();

schro_debug_set_level(avccontext->debug);
p_schro_params->decoder = schro_decoder_new();
schro_decoder_set_skip_ratio(p_schro_params->decoder, 1);

if (!p_schro_params->decoder)
return -1;

/* Initialize the decoded frame queue. */
ff_dirac_schro_queue_init (&p_schro_params->dec_frame_queue);
return 0 ;
}

static void libschroedinger_decode_buffer_free (SchroBuffer *schro_buf,
void *priv)
{
av_freep(&priv);
}

static void libschroedinger_decode_frame_free (void *frame)
{
schro_frame_unref(frame);
}

static void libschroedinger_handle_first_access_unit(AVCodecContext *avccontext)
{
FfmpegSchroDecoderParams *p_schro_params = avccontext->priv_data;
SchroDecoder *decoder = p_schro_params->decoder;

p_schro_params->format = schro_decoder_get_video_format (decoder);

/* Tell FFmpeg about sequence details. */
if(avcodec_check_dimensions(avccontext, p_schro_params->format->width,
p_schro_params->format->height) < 0) {
av_log(avccontext, AV_LOG_ERROR, "invalid dimensions (%dx%d)\n",
p_schro_params->format->width, p_schro_params->format->height);
avccontext->height = avccontext->width = 0;
return -1;
}
avccontext->height = p_schro_params->format->height;
avccontext->width = p_schro_params->format->width;
avccontext->pix_fmt =
GetFfmpegChromaFormat(p_schro_params->format->chroma_format);

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 only supports planar YUV 4:2:0, 4:2:2 "
"and 4:4:4 formats.\n");
return -1;
}

avccontext->time_base.den = p_schro_params->format->frame_rate_numerator;
avccontext->time_base.num = p_schro_params->format->frame_rate_denominator;

if (p_schro_params->dec_pic.data[0] == NULL)
{
avpicture_alloc(&p_schro_params->dec_pic,
avccontext->pix_fmt,
avccontext->width,
avccontext->height);
}
}

static int libschroedinger_decode_frame(AVCodecContext *avccontext,
void *data, int *data_size,
const uint8_t *buf, int buf_size)
{

FfmpegSchroDecoderParams *p_schro_params = avccontext->priv_data;
SchroDecoder *decoder = p_schro_params->decoder;
SchroVideoFormat *format;
AVPicture *picture = data;
SchroBuffer *enc_buf;
SchroFrame* frame;
int state;
int go = 1;

*data_size = 0;

if (buf_size>0) {
unsigned char *in_buf = av_malloc(buf_size);
memcpy (in_buf, buf, buf_size);
enc_buf = schro_buffer_new_with_data (in_buf, buf_size);
enc_buf->free = libschroedinger_decode_buffer_free;
enc_buf->priv = in_buf;
/* Push buffer into decoder. */
state = schro_decoder_push (decoder, enc_buf);
if (state == SCHRO_DECODER_FIRST_ACCESS_UNIT)
libschroedinger_handle_first_access_unit(avccontext);
} else {
if (!p_schro_params->eos_signalled) {
state = schro_decoder_push_end_of_stream(decoder);
p_schro_params->eos_signalled = 1;
}
}

format = p_schro_params->format;

while (go) {
/* Parse data and process result. */
state = schro_decoder_wait (decoder);
switch (state)
{
case SCHRO_DECODER_FIRST_ACCESS_UNIT:
libschroedinger_handle_first_access_unit (avccontext);
break;

case SCHRO_DECODER_NEED_BITS:
/* Need more input data - stop iterating over what we have. */
go = 0;
break;

case SCHRO_DECODER_NEED_FRAME:
/* Decoder needs a frame - create one and push it in. */

frame = schro_frame_new_and_alloc(NULL,
p_schro_params->frame_format,
format->width,
format->height);
schro_decoder_add_output_picture (decoder, frame);
break;

case SCHRO_DECODER_OK:
/* Pull a frame out of the decoder. */
frame = schro_decoder_pull (decoder);

if (frame) {
ff_dirac_schro_queue_push_back(
&p_schro_params->dec_frame_queue,
frame);
}
break;
case SCHRO_DECODER_EOS:
go = 0;
p_schro_params->eos_pulled = 1;
schro_decoder_reset (decoder);
break;

case SCHRO_DECODER_ERROR:
return -1;
break;
}
}

/* Grab next frame to be returned from the top of the queue. */
frame = ff_dirac_schro_queue_pop(&p_schro_params->dec_frame_queue);

if (frame != NULL) {
memcpy (p_schro_params->dec_pic.data[0],
frame->components[0].data,
frame->components[0].length);

memcpy (p_schro_params->dec_pic.data[1],
frame->components[1].data,
frame->components[1].length);

memcpy (p_schro_params->dec_pic.data[2],
frame->components[2].data,
frame->components[2].length);

/* Fill picture with current buffer data from Schroedinger. */
avpicture_fill(picture, p_schro_params->dec_pic.data[0],
avccontext->pix_fmt,
avccontext->width, avccontext->height);

*data_size = sizeof(AVPicture);

/* Now free the frame resources. */
libschroedinger_decode_frame_free (frame);
}
return buf_size;
}


static int libschroedinger_decode_close(AVCodecContext *avccontext)
{
FfmpegSchroDecoderParams *p_schro_params = avccontext->priv_data;
/* Free the decoder. */
schro_decoder_free (p_schro_params->decoder);
av_freep(&p_schro_params->format);

avpicture_free (&p_schro_params->dec_pic);

/* Free data in the output frame queue. */
ff_dirac_schro_queue_free (&p_schro_params->dec_frame_queue,
libschroedinger_decode_frame_free);

return 0 ;
}

static void libschroedinger_flush (AVCodecContext *avccontext)
{
/* Got a seek request. Free the decoded frames queue and then reset
* the decoder */
FfmpegSchroDecoderParams *p_schro_params = avccontext->priv_data;

/* Free data in the output frame queue. */
ff_dirac_schro_queue_free (&p_schro_params->dec_frame_queue,
libschroedinger_decode_frame_free);

ff_dirac_schro_queue_init (&p_schro_params->dec_frame_queue);
schro_decoder_reset(p_schro_params->decoder);
p_schro_params->eos_pulled = 0;
p_schro_params->eos_signalled = 0;
}

AVCodec libschroedinger_decoder = {
"libschroedinger",
CODEC_TYPE_VIDEO,
CODEC_ID_DIRAC,
sizeof(FfmpegSchroDecoderParams),
libschroedinger_decode_init,
NULL,
libschroedinger_decode_close,
libschroedinger_decode_frame,
CODEC_CAP_DELAY,
.flush = libschroedinger_flush
};

+ 387
- 0
libavcodec/libschroedingerenc.c View File

@@ -0,0 +1,387 @@
/*
* 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, -1},
};

Write Preview
Loading…
Cancel
Save