mirror of
https://github.com/hrydgard/ppsspp.git
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145 lines
4 KiB
C
145 lines
4 KiB
C
/*
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* utils for libavcodec
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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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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* utils.
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*/
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#include "util_internal.h"
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#include "avcodec.h"
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#include "compat.h"
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#include "channel_layout.h"
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#include "common.h"
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#include "mathematics.h"
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#include "samplefmt.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "version.h"
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#include <stdlib.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <float.h>
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int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, void **options)
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{
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if ((codec && avctx->codec && codec != avctx->codec)) {
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av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
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"but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
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return AVERROR(EINVAL);
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}
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if (!codec)
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codec = avctx->codec;
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if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
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return AVERROR(EINVAL);
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int ret = 0;
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if (codec->priv_data_size > 0) {
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if (!avctx->priv_data) {
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avctx->priv_data = av_mallocz(codec->priv_data_size);
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if (!avctx->priv_data) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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if (codec->priv_class) {
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*(const AVClass **)avctx->priv_data = codec->priv_class;
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}
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}
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} else {
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avctx->priv_data = NULL;
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}
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if (avctx->channels > FF_SANE_NB_CHANNELS) {
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ret = AVERROR(EINVAL);
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goto free_and_end;
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}
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avctx->codec = codec;
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avctx->codec_id = codec->id;
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avctx->frame_number = 0;
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if (avctx->codec->init) {
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ret = avctx->codec->init(avctx);
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if (ret < 0) {
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goto free_and_end;
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}
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}
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ret=0;
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/* validate channel layout from the decoder */
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if (avctx->channel_layout) {
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int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
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if (!avctx->channels)
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avctx->channels = channels;
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else if (channels != avctx->channels) {
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char buf[512] = "";
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av_log(avctx, AV_LOG_WARNING,
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"Channel layout '%s' with %d channels does not match specified number of channels %d: "
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"ignoring specified channel layout\n",
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buf, channels, avctx->channels);
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avctx->channel_layout = 0;
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}
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}
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if (avctx->channels && avctx->channels < 0 ||
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avctx->channels > FF_SANE_NB_CHANNELS) {
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ret = AVERROR(EINVAL);
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goto free_and_end;
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}
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if (codec->priv_data_size > 0 && avctx->priv_data && codec->priv_class) {
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av_assert0(*(const AVClass **)avctx->priv_data == codec->priv_class);
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}
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end:
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return ret;
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free_and_end:
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if (avctx->codec)
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avctx->codec->close(avctx);
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av_freep(&avctx->priv_data);
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avctx->codec = NULL;
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goto end;
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}
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av_cold int avcodec_close(AVCodecContext *avctx)
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{
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int i;
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if (!avctx)
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return 0;
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if (avctx->codec && avctx->codec->close)
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avctx->codec->close(avctx);
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av_freep(&avctx->priv_data);
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avctx->codec = NULL;
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return 0;
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}
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void avcodec_flush_buffers(AVCodecContext *avctx)
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{
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if (avctx->codec->flush)
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avctx->codec->flush(avctx);
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}
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