mirror of https://github.com/FFmpeg/FFmpeg.git
Patch by James Zern for Google, Inc., jzern google com Originally committed as revision 23303 to svn://svn.ffmpeg.org/ffmpeg/trunkoldabi
James Zern
15 years ago
committed by
Carl Eugen Hoyos
parent
ce2a9bc3c8
commit
8299a7f819
7 changed files with 136 additions and 2 deletions
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/*
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* Copyright (c) 2010, Google, Inc. |
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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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* VP8 decoder support via libvpx |
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*/ |
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#define VPX_CODEC_DISABLE_COMPAT 1 |
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#include <vpx_decoder.h> |
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#include <vp8dx.h> |
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#include "avcodec.h" |
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typedef struct VP8DecoderContext { |
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struct vpx_codec_ctx decoder; |
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} VP8Context; |
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static av_cold int vp8_init(AVCodecContext *avctx) |
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{ |
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VP8Context *ctx = avctx->priv_data; |
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const struct vpx_codec_iface *iface = &vpx_codec_vp8_dx_algo; |
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struct vpx_codec_dec_cfg deccfg = { |
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/* token partitions+1 would be a decent choice */ |
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.threads = FFMIN(avctx->thread_count, 16) |
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}; |
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av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str()); |
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av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config()); |
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if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) { |
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const char *error = vpx_codec_error(&ctx->decoder); |
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av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n", |
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error); |
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return AVERROR(EINVAL); |
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} |
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avctx->pix_fmt = PIX_FMT_YUV420P; |
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return 0; |
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} |
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static int vp8_decode(AVCodecContext *avctx, |
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void *data, int *data_size, AVPacket *avpkt) |
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{ |
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VP8Context *ctx = avctx->priv_data; |
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AVFrame *picture = data; |
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const void *iter = NULL; |
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struct vpx_image *img; |
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if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) != |
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VPX_CODEC_OK) { |
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const char *error = vpx_codec_error(&ctx->decoder); |
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const char *detail = vpx_codec_error_detail(&ctx->decoder); |
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av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error); |
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if (detail) |
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av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", |
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detail); |
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return AVERROR_INVALIDDATA; |
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} |
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if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) { |
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if (img->fmt != VPX_IMG_FMT_I420) { |
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av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n", |
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img->fmt); |
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return AVERROR_INVALIDDATA; |
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} |
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if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) { |
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av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n", |
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avctx->width, avctx->height, img->d_w, img->d_h); |
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if (avcodec_check_dimensions(avctx, img->d_w, img->d_h)) |
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return AVERROR_INVALIDDATA; |
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avcodec_set_dimensions(avctx, img->d_w, img->d_h); |
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} |
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picture->data[0] = img->planes[0]; |
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picture->data[1] = img->planes[1]; |
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picture->data[2] = img->planes[2]; |
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picture->data[3] = NULL; |
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picture->linesize[0] = img->stride[0]; |
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picture->linesize[1] = img->stride[1]; |
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picture->linesize[2] = img->stride[2]; |
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picture->linesize[3] = 0; |
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*data_size = sizeof(AVPicture); |
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} |
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return avpkt->size; |
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} |
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static av_cold int vp8_free(AVCodecContext *avctx) |
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{ |
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VP8Context *ctx = avctx->priv_data; |
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vpx_codec_destroy(&ctx->decoder); |
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return 0; |
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} |
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AVCodec libvpx_decoder = { |
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"libvpx", |
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AVMEDIA_TYPE_VIDEO, |
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CODEC_ID_VP8, |
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sizeof(VP8Context), |
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vp8_init, |
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NULL, /* encode */ |
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vp8_free, |
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vp8_decode, |
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0, /* capabilities */ |
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.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"), |
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}; |
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