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456 lines
16 KiB
456 lines
16 KiB
/* |
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* Dirac encoder support via Schroedinger libraries |
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* Copyright (c) 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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/** |
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* @file |
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* Dirac encoder support via libschroedinger-1.0 libraries. More details about |
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* the Schroedinger project can be found at http://www.diracvideo.org/. |
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* The 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 <schroedinger/schro.h> |
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#include <schroedinger/schrodebug.h> |
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#include <schroedinger/schrovideoformat.h> |
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#include "libavutil/attributes.h" |
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#include "libavutil/avassert.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "libschroedinger.h" |
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#include "bytestream.h" |
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/** libschroedinger encoder private data */ |
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typedef struct SchroEncoderParams { |
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/** Schroedinger video format */ |
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SchroVideoFormat *format; |
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/** Schroedinger frame format */ |
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SchroFrameFormat frame_format; |
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/** frame size */ |
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int frame_size; |
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/** Schroedinger encoder handle*/ |
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SchroEncoder* encoder; |
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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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FFSchroQueue enc_frame_queue; |
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/** end of sequence signalled */ |
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int eos_signalled; |
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/** end of sequence pulled */ |
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int eos_pulled; |
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/* counter for frames submitted to encoder, used as dts */ |
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int64_t dts; |
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} SchroEncoderParams; |
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/** |
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* Works out Schro-compatible chroma format. |
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*/ |
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static int set_chroma_format(AVCodecContext *avctx) |
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{ |
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int num_formats = sizeof(schro_pixel_format_map) / |
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sizeof(schro_pixel_format_map[0]); |
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int idx; |
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SchroEncoderParams *p_schro_params = avctx->priv_data; |
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for (idx = 0; idx < num_formats; ++idx) { |
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if (schro_pixel_format_map[idx].ff_pix_fmt == avctx->pix_fmt) { |
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p_schro_params->format->chroma_format = |
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schro_pixel_format_map[idx].schro_pix_fmt; |
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return 0; |
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} |
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} |
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av_log(avctx, AV_LOG_ERROR, |
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"This codec currently only supports planar YUV 4:2:0, 4:2:2" |
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" and 4:4:4 formats.\n"); |
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return -1; |
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} |
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static av_cold int libschroedinger_encode_init(AVCodecContext *avctx) |
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{ |
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SchroEncoderParams *p_schro_params = avctx->priv_data; |
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SchroVideoFormatEnum preset; |
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/* Initialize the libraries that libschroedinger depends on. */ |
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schro_init(); |
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/* Create an encoder object. */ |
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p_schro_params->encoder = schro_encoder_new(); |
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if (!p_schro_params->encoder) { |
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av_log(avctx, AV_LOG_ERROR, |
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"Unrecoverable Error: schro_encoder_new failed. "); |
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return -1; |
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} |
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/* Initialize the format. */ |
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preset = ff_get_schro_video_format_preset(avctx); |
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p_schro_params->format = |
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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); |
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p_schro_params->format->width = avctx->width; |
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p_schro_params->format->height = avctx->height; |
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if (set_chroma_format(avctx) == -1) |
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return -1; |
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if (avctx->color_primaries == AVCOL_PRI_BT709) { |
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p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV; |
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} else if (avctx->color_primaries == AVCOL_PRI_BT470BG) { |
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p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625; |
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} else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M) { |
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p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525; |
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} |
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if (avctx->colorspace == AVCOL_SPC_BT709) { |
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p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV; |
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} else if (avctx->colorspace == AVCOL_SPC_BT470BG) { |
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p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV; |
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} |
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if (avctx->color_trc == AVCOL_TRC_BT709) { |
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p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA; |
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} |
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if (ff_get_schro_frame_format(p_schro_params->format->chroma_format, |
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&p_schro_params->frame_format) == -1) { |
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av_log(avctx, AV_LOG_ERROR, |
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"This codec currently supports only planar YUV 4:2:0, 4:2:2" |
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" and 4:4:4 formats.\n"); |
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return -1; |
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} |
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p_schro_params->format->frame_rate_numerator = avctx->time_base.den; |
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p_schro_params->format->frame_rate_denominator = avctx->time_base.num; |
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p_schro_params->frame_size = avpicture_get_size(avctx->pix_fmt, |
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avctx->width, |
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avctx->height); |
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if (!avctx->gop_size) { |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"gop_structure", |
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SCHRO_ENCODER_GOP_INTRA_ONLY); |
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if (avctx->coder_type == FF_CODER_TYPE_VLC) |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"enable_noarith", 1); |
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} else { |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"au_distance", avctx->gop_size); |
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avctx->has_b_frames = 1; |
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p_schro_params->dts = -1; |
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} |
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/* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */ |
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if (avctx->flags & AV_CODEC_FLAG_QSCALE) { |
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if (!avctx->global_quality) { |
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/* lossless coding */ |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"rate_control", |
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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, |
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"rate_control", |
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SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY); |
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quality = avctx->global_quality / FF_QP2LAMBDA; |
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if (quality > 10) |
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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 { |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"rate_control", |
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SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE); |
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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"bitrate", avctx->bit_rate); |
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} |
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if (avctx->flags & AV_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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schro_encoder_setting_set_double(p_schro_params->encoder, |
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"interlaced_coding", 1); |
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schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop", |
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!(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP)); |
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/* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger |
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* and libdirac support other bit-depth data. */ |
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schro_video_format_set_std_signal_range(p_schro_params->format, |
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SCHRO_SIGNAL_RANGE_8BIT_VIDEO); |
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/* Set the encoder format. */ |
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schro_encoder_set_video_format(p_schro_params->encoder, |
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p_schro_params->format); |
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/* Set the debug level. */ |
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schro_debug_set_level(avctx->debug); |
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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); |
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return 0; |
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} |
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static SchroFrame *libschroedinger_frame_from_data(AVCodecContext *avctx, |
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const AVFrame *frame) |
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{ |
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SchroEncoderParams *p_schro_params = avctx->priv_data; |
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SchroFrame *in_frame; |
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/* Input line size may differ from what the codec supports. Especially |
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* when transcoding from one format to another. So use avpicture_layout |
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* to copy the frame. */ |
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in_frame = ff_create_schro_frame(avctx, p_schro_params->frame_format); |
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if (in_frame) |
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avpicture_layout((const AVPicture *)frame, avctx->pix_fmt, |
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avctx->width, avctx->height, |
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in_frame->components[0].data, |
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p_schro_params->frame_size); |
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return in_frame; |
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} |
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static void libschroedinger_free_frame(void *data) |
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{ |
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FFSchroEncodedFrame *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 libschroedinger_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *frame, int *got_packet) |
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{ |
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int enc_size = 0; |
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SchroEncoderParams *p_schro_params = avctx->priv_data; |
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SchroEncoder *encoder = p_schro_params->encoder; |
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struct FFSchroEncodedFrame *p_frame_output = NULL; |
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int go = 1; |
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SchroBuffer *enc_buf; |
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int presentation_frame; |
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int parse_code; |
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int last_frame_in_sequence = 0; |
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int pkt_size, ret; |
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if (!frame) { |
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/* Push end of sequence if not already signalled. */ |
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if (!p_schro_params->eos_signalled) { |
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schro_encoder_end_of_stream(encoder); |
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p_schro_params->eos_signalled = 1; |
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} |
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} else { |
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/* Allocate frame data to schro input buffer. */ |
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SchroFrame *in_frame = libschroedinger_frame_from_data(avctx, frame); |
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if (!in_frame) |
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return AVERROR(ENOMEM); |
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/* Load next frame. */ |
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schro_encoder_push_frame(encoder, in_frame); |
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} |
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if (p_schro_params->eos_pulled) |
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go = 0; |
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/* Now check to see if we have any output from the encoder. */ |
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while (go) { |
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int err; |
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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: |
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case SCHRO_STATE_END_OF_STREAM: |
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enc_buf = schro_encoder_pull(encoder, &presentation_frame); |
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if (enc_buf->length <= 0) |
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return AVERROR_BUG; |
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parse_code = enc_buf->data[4]; |
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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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if ((err = av_reallocp(&p_schro_params->enc_buf, |
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p_schro_params->enc_buf_size + |
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enc_buf->length)) < 0) { |
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p_schro_params->enc_buf_size = 0; |
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return err; |
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} |
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memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size, |
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enc_buf->data, enc_buf->length); |
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p_schro_params->enc_buf_size += enc_buf->length; |
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if (state == SCHRO_STATE_END_OF_STREAM) { |
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p_schro_params->eos_pulled = 1; |
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go = 0; |
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} |
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if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) { |
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schro_buffer_unref(enc_buf); |
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break; |
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} |
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/* Create output frame. */ |
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p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame)); |
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if (!p_frame_output) |
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return AVERROR(ENOMEM); |
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/* Set output data. */ |
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p_frame_output->size = p_schro_params->enc_buf_size; |
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p_frame_output->p_encbuf = p_schro_params->enc_buf; |
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if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) && |
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SCHRO_PARSE_CODE_IS_REFERENCE(parse_code)) |
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p_frame_output->key_frame = 1; |
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/* Parse the coded frame number from the bitstream. Bytes 14 |
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* through 17 represesent the frame number. */ |
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p_frame_output->frame_num = AV_RB32(enc_buf->data + 13); |
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ff_schro_queue_push_back(&p_schro_params->enc_frame_queue, |
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p_frame_output); |
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p_schro_params->enc_buf_size = 0; |
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p_schro_params->enc_buf = NULL; |
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schro_buffer_unref(enc_buf); |
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break; |
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case SCHRO_STATE_NEED_FRAME: |
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go = 0; |
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break; |
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case SCHRO_STATE_AGAIN: |
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break; |
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default: |
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av_log(avctx, AV_LOG_ERROR, "Unknown Schro 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_schro_params->enc_frame_queue.size == 1 && |
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p_schro_params->eos_pulled) |
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last_frame_in_sequence = 1; |
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p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue); |
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if (!p_frame_output) |
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return 0; |
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pkt_size = p_frame_output->size; |
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if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) |
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pkt_size += p_schro_params->enc_buf_size; |
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if ((ret = ff_alloc_packet2(avctx, pkt, pkt_size, 0)) < 0) |
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goto error; |
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memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size); |
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#if FF_API_CODED_FRAME |
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FF_DISABLE_DEPRECATION_WARNINGS |
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avctx->coded_frame->key_frame = p_frame_output->key_frame; |
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avctx->coded_frame->pts = p_frame_output->frame_num; |
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FF_ENABLE_DEPRECATION_WARNINGS |
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#endif |
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/* Use the frame number of the encoded frame as the pts. It is OK to |
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* do so since Dirac is a constant frame rate codec. It expects input |
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* to be of constant frame rate. */ |
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pkt->pts = p_frame_output->frame_num; |
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pkt->dts = p_schro_params->dts++; |
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enc_size = p_frame_output->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_schro_params->enc_buf_size > 0) { |
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memcpy(pkt->data + enc_size, p_schro_params->enc_buf, |
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p_schro_params->enc_buf_size); |
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enc_size += p_schro_params->enc_buf_size; |
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av_freep(&p_schro_params->enc_buf); |
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p_schro_params->enc_buf_size = 0; |
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} |
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if (p_frame_output->key_frame) |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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*got_packet = 1; |
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error: |
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/* free frame */ |
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libschroedinger_free_frame(p_frame_output); |
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return ret; |
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} |
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static int libschroedinger_encode_close(AVCodecContext *avctx) |
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{ |
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SchroEncoderParams *p_schro_params = avctx->priv_data; |
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/* Close the encoder. */ |
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schro_encoder_free(p_schro_params->encoder); |
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/* Free data in the output frame queue. */ |
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ff_schro_queue_free(&p_schro_params->enc_frame_queue, |
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libschroedinger_free_frame); |
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/* Free the encoder buffer. */ |
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if (p_schro_params->enc_buf_size) |
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av_freep(&p_schro_params->enc_buf); |
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/* Free the video format structure. */ |
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av_freep(&p_schro_params->format); |
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return 0; |
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} |
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AVCodec ff_libschroedinger_encoder = { |
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.name = "libschroedinger", |
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.long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_DIRAC, |
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.priv_data_size = sizeof(SchroEncoderParams), |
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.init = libschroedinger_encode_init, |
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.encode2 = libschroedinger_encode_frame, |
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.close = libschroedinger_encode_close, |
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.capabilities = AV_CODEC_CAP_DELAY, |
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.pix_fmts = (const enum AVPixelFormat[]){ |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE |
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}, |
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};
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