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Passing an explicit filename to this command is only necessary if the documentation in the @file block refers to a file different from the one the block resides in. Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
406 lines
14 KiB
C
406 lines
14 KiB
C
/*
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* Dirac encoding support via libdirac library
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* Copyright (c) 2005 BBC, Andrew Kennedy <dirac at rd dot bbc dot co dot uk>
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* Copyright (c) 2006-2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Dirac encoding support via libdirac library; more details about the
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* Dirac project can be found at http://dirac.sourceforge.net/.
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* The libdirac_encoder library implements Dirac specification version 2.2
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* (http://dirac.sourceforge.net/specification.html).
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*/
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#include "libdirac_libschro.h"
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#include "libdirac.h"
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#undef NDEBUG
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#include <assert.h>
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#include <libdirac_encoder/dirac_encoder.h>
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/** Dirac encoder private data */
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typedef struct FfmpegDiracEncoderParams {
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/** Dirac encoder context */
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dirac_encoder_context_t enc_ctx;
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/** frame being encoded */
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AVFrame picture;
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/** frame size */
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int frame_size;
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/** Dirac encoder handle */
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dirac_encoder_t* p_encoder;
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/** input frame buffer */
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unsigned char *p_in_frame_buf;
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/** buffer to store encoder output before writing it to the frame queue */
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unsigned char *enc_buf;
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/** size of encoder buffer */
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int enc_buf_size;
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/** queue storing encoded frames */
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FfmpegDiracSchroQueue enc_frame_queue;
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/** end of sequence signalled by user, 0 - false, 1 - true */
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int eos_signalled;
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/** end of sequence returned by encoder, 0 - false, 1 - true */
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int eos_pulled;
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} FfmpegDiracEncoderParams;
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/**
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* Works out Dirac-compatible chroma format.
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*/
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static dirac_chroma_t GetDiracChromaFormat(enum PixelFormat ff_pix_fmt)
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{
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int num_formats = sizeof(ffmpeg_dirac_pixel_format_map) /
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sizeof(ffmpeg_dirac_pixel_format_map[0]);
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int idx;
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for (idx = 0; idx < num_formats; ++idx)
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if (ffmpeg_dirac_pixel_format_map[idx].ff_pix_fmt == ff_pix_fmt)
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return ffmpeg_dirac_pixel_format_map[idx].dirac_pix_fmt;
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return formatNK;
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}
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/**
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* Dirac video preset table. Ensure that this tables matches up correctly
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* with the ff_dirac_schro_video_format_info table in libdirac_libschro.c.
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*/
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static const VideoFormat ff_dirac_video_formats[]={
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VIDEO_FORMAT_CUSTOM ,
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VIDEO_FORMAT_QSIF525 ,
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VIDEO_FORMAT_QCIF ,
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VIDEO_FORMAT_SIF525 ,
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VIDEO_FORMAT_CIF ,
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VIDEO_FORMAT_4SIF525 ,
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VIDEO_FORMAT_4CIF ,
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VIDEO_FORMAT_SD_480I60 ,
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VIDEO_FORMAT_SD_576I50 ,
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VIDEO_FORMAT_HD_720P60 ,
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VIDEO_FORMAT_HD_720P50 ,
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VIDEO_FORMAT_HD_1080I60 ,
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VIDEO_FORMAT_HD_1080I50 ,
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VIDEO_FORMAT_HD_1080P60 ,
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VIDEO_FORMAT_HD_1080P50 ,
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VIDEO_FORMAT_DIGI_CINEMA_2K24 ,
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VIDEO_FORMAT_DIGI_CINEMA_4K24 ,
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};
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/**
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* Returns the video format preset matching the input video dimensions and
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* time base.
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*/
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static VideoFormat GetDiracVideoFormatPreset(AVCodecContext *avccontext)
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{
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unsigned int num_formats = sizeof(ff_dirac_video_formats) /
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sizeof(ff_dirac_video_formats[0]);
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unsigned int idx = ff_dirac_schro_get_video_format_idx(avccontext);
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return (idx < num_formats) ?
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ff_dirac_video_formats[idx] : VIDEO_FORMAT_CUSTOM;
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}
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static av_cold int libdirac_encode_init(AVCodecContext *avccontext)
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{
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FfmpegDiracEncoderParams* p_dirac_params = avccontext->priv_data;
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int no_local = 1;
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int verbose = avccontext->debug;
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VideoFormat preset;
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/* get Dirac preset */
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preset = GetDiracVideoFormatPreset(avccontext);
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/* initialize the encoder context */
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dirac_encoder_context_init(&(p_dirac_params->enc_ctx), preset);
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p_dirac_params->enc_ctx.src_params.chroma = GetDiracChromaFormat(avccontext->pix_fmt);
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if (p_dirac_params->enc_ctx.src_params.chroma == formatNK) {
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av_log(avccontext, AV_LOG_ERROR,
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"Unsupported pixel format %d. This codec supports only "
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"Planar YUV formats (yuv420p, yuv422p, yuv444p\n",
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avccontext->pix_fmt);
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return -1;
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}
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p_dirac_params->enc_ctx.src_params.frame_rate.numerator = avccontext->time_base.den;
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p_dirac_params->enc_ctx.src_params.frame_rate.denominator = avccontext->time_base.num;
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p_dirac_params->enc_ctx.src_params.width = avccontext->width;
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p_dirac_params->enc_ctx.src_params.height = avccontext->height;
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p_dirac_params->frame_size = avpicture_get_size(avccontext->pix_fmt,
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avccontext->width,
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avccontext->height);
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avccontext->coded_frame = &p_dirac_params->picture;
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if (no_local) {
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p_dirac_params->enc_ctx.decode_flag = 0;
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p_dirac_params->enc_ctx.instr_flag = 0;
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} else {
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p_dirac_params->enc_ctx.decode_flag = 1;
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p_dirac_params->enc_ctx.instr_flag = 1;
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}
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/* Intra-only sequence */
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if (!avccontext->gop_size) {
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p_dirac_params->enc_ctx.enc_params.num_L1 = 0;
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if (avccontext->coder_type == FF_CODER_TYPE_VLC)
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p_dirac_params->enc_ctx.enc_params.using_ac = 0;
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} else
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avccontext->has_b_frames = 1;
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if (avccontext->flags & CODEC_FLAG_QSCALE) {
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if (avccontext->global_quality) {
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p_dirac_params->enc_ctx.enc_params.qf = avccontext->global_quality
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/ (FF_QP2LAMBDA * 10.0);
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/* if it is not default bitrate then send target rate. */
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if (avccontext->bit_rate >= 1000 &&
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avccontext->bit_rate != 200000)
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p_dirac_params->enc_ctx.enc_params.trate = avccontext->bit_rate
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/ 1000;
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} else
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p_dirac_params->enc_ctx.enc_params.lossless = 1;
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} else if (avccontext->bit_rate >= 1000)
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p_dirac_params->enc_ctx.enc_params.trate = avccontext->bit_rate / 1000;
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if ((preset > VIDEO_FORMAT_QCIF || preset < VIDEO_FORMAT_QSIF525) &&
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avccontext->bit_rate == 200000)
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p_dirac_params->enc_ctx.enc_params.trate = 0;
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if (avccontext->flags & CODEC_FLAG_INTERLACED_ME)
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/* all material can be coded as interlaced or progressive
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* irrespective of the type of source material */
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p_dirac_params->enc_ctx.enc_params.picture_coding_mode = 1;
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p_dirac_params->p_encoder = dirac_encoder_init(&(p_dirac_params->enc_ctx),
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verbose);
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if (!p_dirac_params->p_encoder) {
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av_log(avccontext, AV_LOG_ERROR,
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"Unrecoverable Error: dirac_encoder_init failed. ");
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return EXIT_FAILURE;
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}
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/* allocate enough memory for the incoming data */
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p_dirac_params->p_in_frame_buf = av_malloc(p_dirac_params->frame_size);
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/* initialize the encoded frame queue */
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ff_dirac_schro_queue_init(&p_dirac_params->enc_frame_queue);
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return 0;
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}
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static void DiracFreeFrame(void *data)
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{
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FfmpegDiracSchroEncodedFrame *enc_frame = data;
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av_freep(&(enc_frame->p_encbuf));
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av_free(enc_frame);
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}
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static int libdirac_encode_frame(AVCodecContext *avccontext,
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unsigned char *frame,
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int buf_size, void *data)
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{
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int enc_size = 0;
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dirac_encoder_state_t state;
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FfmpegDiracEncoderParams* p_dirac_params = avccontext->priv_data;
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FfmpegDiracSchroEncodedFrame* p_frame_output = NULL;
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FfmpegDiracSchroEncodedFrame* p_next_output_frame = NULL;
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int go = 1;
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int last_frame_in_sequence = 0;
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if (!data) {
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/* push end of sequence if not already signalled */
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if (!p_dirac_params->eos_signalled) {
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dirac_encoder_end_sequence(p_dirac_params->p_encoder);
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p_dirac_params->eos_signalled = 1;
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}
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} else {
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/* Allocate frame data to Dirac input buffer.
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* Input line size may differ from what the codec supports,
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* especially when transcoding from one format to another.
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* So use avpicture_layout to copy the frame. */
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avpicture_layout((AVPicture *)data, avccontext->pix_fmt,
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avccontext->width, avccontext->height,
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p_dirac_params->p_in_frame_buf,
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p_dirac_params->frame_size);
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/* load next frame */
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if (dirac_encoder_load(p_dirac_params->p_encoder,
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p_dirac_params->p_in_frame_buf,
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p_dirac_params->frame_size) < 0) {
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av_log(avccontext, AV_LOG_ERROR, "Unrecoverable Encoder Error."
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" dirac_encoder_load failed...\n");
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return -1;
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}
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}
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if (p_dirac_params->eos_pulled)
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go = 0;
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while (go) {
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p_dirac_params->p_encoder->enc_buf.buffer = frame;
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p_dirac_params->p_encoder->enc_buf.size = buf_size;
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/* process frame */
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state = dirac_encoder_output(p_dirac_params->p_encoder);
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switch (state) {
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case ENC_STATE_AVAIL:
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case ENC_STATE_EOS:
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assert(p_dirac_params->p_encoder->enc_buf.size > 0);
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/* All non-frame data is prepended to actual frame data to
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* be able to set the pts correctly. So we don't write data
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* to the frame output queue until we actually have a frame
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*/
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p_dirac_params->enc_buf = av_realloc(p_dirac_params->enc_buf,
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p_dirac_params->enc_buf_size +
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p_dirac_params->p_encoder->enc_buf.size);
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memcpy(p_dirac_params->enc_buf + p_dirac_params->enc_buf_size,
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p_dirac_params->p_encoder->enc_buf.buffer,
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p_dirac_params->p_encoder->enc_buf.size);
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p_dirac_params->enc_buf_size += p_dirac_params->p_encoder->enc_buf.size;
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if (state == ENC_STATE_EOS) {
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p_dirac_params->eos_pulled = 1;
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go = 0;
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}
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/* If non-frame data, don't output it until it we get an
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* encoded frame back from the encoder. */
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if (p_dirac_params->p_encoder->enc_pparams.pnum == -1)
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break;
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/* create output frame */
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p_frame_output = av_mallocz(sizeof(FfmpegDiracSchroEncodedFrame));
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/* set output data */
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p_frame_output->size = p_dirac_params->enc_buf_size;
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p_frame_output->p_encbuf = p_dirac_params->enc_buf;
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p_frame_output->frame_num = p_dirac_params->p_encoder->enc_pparams.pnum;
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if (p_dirac_params->p_encoder->enc_pparams.ptype == INTRA_PICTURE &&
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p_dirac_params->p_encoder->enc_pparams.rtype == REFERENCE_PICTURE)
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p_frame_output->key_frame = 1;
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ff_dirac_schro_queue_push_back(&p_dirac_params->enc_frame_queue,
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p_frame_output);
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p_dirac_params->enc_buf_size = 0;
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p_dirac_params->enc_buf = NULL;
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break;
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case ENC_STATE_BUFFER:
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go = 0;
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break;
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case ENC_STATE_INVALID:
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av_log(avccontext, AV_LOG_ERROR,
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"Unrecoverable Dirac Encoder Error. Quitting...\n");
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return -1;
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default:
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av_log(avccontext, AV_LOG_ERROR, "Unknown Dirac Encoder state\n");
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return -1;
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}
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}
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/* copy 'next' frame in queue */
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if (p_dirac_params->enc_frame_queue.size == 1 && p_dirac_params->eos_pulled)
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last_frame_in_sequence = 1;
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p_next_output_frame = ff_dirac_schro_queue_pop(&p_dirac_params->enc_frame_queue);
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if (!p_next_output_frame)
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return 0;
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memcpy(frame, p_next_output_frame->p_encbuf, p_next_output_frame->size);
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avccontext->coded_frame->key_frame = p_next_output_frame->key_frame;
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/* Use the frame number of the encoded frame as the pts. It is OK to do
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* so since Dirac is a constant framerate codec. It expects input to be
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* of constant framerate. */
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avccontext->coded_frame->pts = p_next_output_frame->frame_num;
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enc_size = p_next_output_frame->size;
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/* Append the end of sequence information to the last frame in the
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* sequence. */
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if (last_frame_in_sequence && p_dirac_params->enc_buf_size > 0) {
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memcpy(frame + enc_size, p_dirac_params->enc_buf,
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p_dirac_params->enc_buf_size);
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enc_size += p_dirac_params->enc_buf_size;
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av_freep(&p_dirac_params->enc_buf);
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p_dirac_params->enc_buf_size = 0;
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}
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/* free frame */
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DiracFreeFrame(p_next_output_frame);
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return enc_size;
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}
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static av_cold int libdirac_encode_close(AVCodecContext *avccontext)
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{
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FfmpegDiracEncoderParams* p_dirac_params = avccontext->priv_data;
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/* close the encoder */
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dirac_encoder_close(p_dirac_params->p_encoder);
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/* free data in the output frame queue */
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ff_dirac_schro_queue_free(&p_dirac_params->enc_frame_queue,
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DiracFreeFrame);
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/* free the encoder buffer */
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if (p_dirac_params->enc_buf_size)
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av_freep(&p_dirac_params->enc_buf);
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/* free the input frame buffer */
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av_freep(&p_dirac_params->p_in_frame_buf);
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return 0;
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}
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AVCodec libdirac_encoder = {
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"libdirac",
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AVMEDIA_TYPE_VIDEO,
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CODEC_ID_DIRAC,
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sizeof(FfmpegDiracEncoderParams),
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libdirac_encode_init,
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libdirac_encode_frame,
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libdirac_encode_close,
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.capabilities = CODEC_CAP_DELAY,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("libdirac Dirac 2.2"),
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};
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