mirror of https://github.com/FFmpeg/FFmpeg.git
Diego Biurrun
13 years ago
parent
8336eb6f85
commit
a229d6c285
7 changed files with 3 additions and 266 deletions
@ -1,44 +0,0 @@ |
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/*
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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* data structures common to libdirac encoder and decoder |
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*/ |
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#ifndef AVCODEC_LIBDIRAC_H |
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#define AVCODEC_LIBDIRAC_H |
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#include "avcodec.h" |
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#include <libdirac_common/dirac_types.h> |
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/**
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* Table providing a Dirac chroma format to Libav pixel format mapping. |
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*/ |
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static const struct { |
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enum PixelFormat ff_pix_fmt; |
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dirac_chroma_t dirac_pix_fmt; |
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} dirac_pixel_format_map[] = { |
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{ PIX_FMT_YUV420P, format420 }, |
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{ PIX_FMT_YUV422P, format422 }, |
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{ PIX_FMT_YUV444P, format444 }, |
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}; |
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#endif /* AVCODEC_LIBDIRAC_H */ |
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@ -1,208 +0,0 @@ |
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/*
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* Dirac decoder 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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 decoder support via libdirac library; more details about the Dirac |
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* project can be found at http://dirac.sourceforge.net/.
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* The libdirac_decoder 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 "libavutil/imgutils.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_decoder/dirac_parser.h> |
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/** contains a single frame returned from Dirac */ |
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typedef struct DiracDecoderParams { |
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/** decoder handle */ |
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dirac_decoder_t* p_decoder; |
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/** buffer to hold decoded frame */ |
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unsigned char* p_out_frame_buf; |
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} DiracDecoderParams; |
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/**
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* returns Libav chroma format |
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*/ |
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static enum PixelFormat get_chroma_format(dirac_chroma_t dirac_pix_fmt) |
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{ |
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int num_formats = sizeof(dirac_pixel_format_map) / |
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sizeof(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 (dirac_pixel_format_map[idx].dirac_pix_fmt == dirac_pix_fmt) |
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return dirac_pixel_format_map[idx].ff_pix_fmt; |
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return PIX_FMT_NONE; |
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} |
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static av_cold int libdirac_decode_init(AVCodecContext *avccontext) |
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{ |
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DiracDecoderParams *p_dirac_params = avccontext->priv_data; |
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p_dirac_params->p_decoder = dirac_decoder_init(avccontext->debug); |
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if (!p_dirac_params->p_decoder) |
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return -1; |
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return 0; |
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} |
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static int libdirac_decode_frame(AVCodecContext *avccontext, |
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void *data, int *data_size, |
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AVPacket *avpkt) |
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{ |
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const uint8_t *buf = avpkt->data; |
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int buf_size = avpkt->size; |
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DiracDecoderParams *p_dirac_params = avccontext->priv_data; |
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AVPicture *picture = data; |
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AVPicture pic; |
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int pict_size; |
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unsigned char *buffer[3]; |
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*data_size = 0; |
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if (buf_size > 0) { |
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/* set data to decode into buffer */ |
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dirac_buffer(p_dirac_params->p_decoder, buf, buf + buf_size); |
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if ((buf[4] & 0x08) == 0x08 && (buf[4] & 0x03)) |
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avccontext->has_b_frames = 1; |
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} |
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while (1) { |
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/* parse data and process result */ |
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DecoderState state = dirac_parse(p_dirac_params->p_decoder); |
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switch (state) { |
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case STATE_BUFFER: |
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return buf_size; |
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case STATE_SEQUENCE: |
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{ |
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/* tell Libav about sequence details */ |
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dirac_sourceparams_t *src_params = &p_dirac_params->p_decoder->src_params; |
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if (av_image_check_size(src_params->width, src_params->height, |
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0, avccontext) < 0) { |
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av_log(avccontext, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", |
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src_params->width, src_params->height); |
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avccontext->height = avccontext->width = 0; |
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return -1; |
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} |
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avccontext->height = src_params->height; |
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avccontext->width = src_params->width; |
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avccontext->pix_fmt = get_chroma_format(src_params->chroma); |
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if (avccontext->pix_fmt == PIX_FMT_NONE) { |
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av_log(avccontext, AV_LOG_ERROR, |
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"Dirac chroma format %d not supported currently\n", |
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src_params->chroma); |
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return -1; |
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} |
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avccontext->time_base.den = src_params->frame_rate.numerator; |
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avccontext->time_base.num = src_params->frame_rate.denominator; |
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/* calculate output dimensions */ |
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avpicture_fill(&pic, NULL, avccontext->pix_fmt, |
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avccontext->width, avccontext->height); |
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pict_size = avpicture_get_size(avccontext->pix_fmt, |
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avccontext->width, |
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avccontext->height); |
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/* allocate output buffer */ |
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if (!p_dirac_params->p_out_frame_buf) |
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p_dirac_params->p_out_frame_buf = av_malloc(pict_size); |
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buffer[0] = p_dirac_params->p_out_frame_buf; |
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buffer[1] = p_dirac_params->p_out_frame_buf + |
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pic.linesize[0] * avccontext->height; |
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buffer[2] = buffer[1] + |
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pic.linesize[1] * src_params->chroma_height; |
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/* tell Dirac about output destination */ |
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dirac_set_buf(p_dirac_params->p_decoder, buffer, NULL); |
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break; |
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} |
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case STATE_SEQUENCE_END: |
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break; |
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case STATE_PICTURE_AVAIL: |
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/* fill picture with current buffer data from Dirac */ |
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avpicture_fill(picture, p_dirac_params->p_out_frame_buf, |
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avccontext->pix_fmt, |
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avccontext->width, avccontext->height); |
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*data_size = sizeof(AVPicture); |
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return buf_size; |
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case STATE_INVALID: |
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return -1; |
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default: |
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break; |
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} |
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} |
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return buf_size; |
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} |
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static av_cold int libdirac_decode_close(AVCodecContext *avccontext) |
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{ |
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DiracDecoderParams *p_dirac_params = avccontext->priv_data; |
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dirac_decoder_close(p_dirac_params->p_decoder); |
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av_freep(&p_dirac_params->p_out_frame_buf); |
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return 0; |
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} |
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static void libdirac_flush(AVCodecContext *avccontext) |
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{ |
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/* Got a seek request. We will need free memory held in the private
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* context and free the current Dirac decoder handle and then open |
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* a new decoder handle. */ |
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libdirac_decode_close(avccontext); |
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libdirac_decode_init(avccontext); |
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return; |
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} |
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AVCodec ff_libdirac_decoder = { |
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.name = "libdirac", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = CODEC_ID_DIRAC, |
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.priv_data_size = sizeof(DiracDecoderParams), |
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.init = libdirac_decode_init, |
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.close = libdirac_decode_close, |
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.decode = libdirac_decode_frame, |
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.capabilities = CODEC_CAP_DELAY, |
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.flush = libdirac_flush, |
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.long_name = NULL_IF_CONFIG_SMALL("libdirac Dirac 2.2"), |
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}; |
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