| /* |
| * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <string.h> |
| |
| #include "avcodec.h" |
| #include "libavutil/atomic.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/opt.h" |
| |
| #if FF_API_OLD_BSF |
| FF_DISABLE_DEPRECATION_WARNINGS |
| |
| AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f) |
| { |
| const AVBitStreamFilter *filter = NULL; |
| void *opaque = NULL; |
| |
| while (filter != f) |
| filter = av_bsf_next(&opaque); |
| |
| return av_bsf_next(&opaque); |
| } |
| |
| void av_register_bitstream_filter(AVBitStreamFilter *bsf) |
| { |
| } |
| |
| typedef struct BSFCompatContext { |
| AVBSFContext *ctx; |
| int extradata_updated; |
| } BSFCompatContext; |
| |
| AVBitStreamFilterContext *av_bitstream_filter_init(const char *name) |
| { |
| AVBitStreamFilterContext *ctx = NULL; |
| BSFCompatContext *priv = NULL; |
| const AVBitStreamFilter *bsf; |
| |
| bsf = av_bsf_get_by_name(name); |
| if (!bsf) |
| return NULL; |
| |
| ctx = av_mallocz(sizeof(*ctx)); |
| if (!ctx) |
| return NULL; |
| |
| priv = av_mallocz(sizeof(*priv)); |
| if (!priv) |
| goto fail; |
| |
| |
| ctx->filter = bsf; |
| ctx->priv_data = priv; |
| |
| return ctx; |
| |
| fail: |
| if (priv) |
| av_bsf_free(&priv->ctx); |
| av_freep(&priv); |
| av_freep(&ctx); |
| return NULL; |
| } |
| |
| void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc) |
| { |
| BSFCompatContext *priv; |
| |
| if (!bsfc) |
| return; |
| |
| priv = bsfc->priv_data; |
| |
| av_bsf_free(&priv->ctx); |
| av_freep(&bsfc->priv_data); |
| av_free(bsfc); |
| } |
| |
| int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, |
| AVCodecContext *avctx, const char *args, |
| uint8_t **poutbuf, int *poutbuf_size, |
| const uint8_t *buf, int buf_size, int keyframe) |
| { |
| BSFCompatContext *priv = bsfc->priv_data; |
| AVPacket pkt = { 0 }; |
| int ret; |
| |
| if (!priv->ctx) { |
| ret = av_bsf_alloc(bsfc->filter, &priv->ctx); |
| if (ret < 0) |
| return ret; |
| |
| ret = avcodec_parameters_from_context(priv->ctx->par_in, avctx); |
| if (ret < 0) |
| return ret; |
| |
| priv->ctx->time_base_in = avctx->time_base; |
| |
| if (bsfc->args && bsfc->filter->priv_class) { |
| const AVOption *opt = av_opt_next(priv->ctx->priv_data, NULL); |
| const char * shorthand[2] = {NULL}; |
| |
| if (opt) |
| shorthand[0] = opt->name; |
| |
| ret = av_opt_set_from_string(priv->ctx->priv_data, bsfc->args, shorthand, "=", ":"); |
| } |
| |
| ret = av_bsf_init(priv->ctx); |
| if (ret < 0) |
| return ret; |
| } |
| |
| pkt.data = buf; |
| pkt.size = buf_size; |
| |
| ret = av_bsf_send_packet(priv->ctx, &pkt); |
| if (ret < 0) |
| return ret; |
| |
| *poutbuf = NULL; |
| *poutbuf_size = 0; |
| |
| ret = av_bsf_receive_packet(priv->ctx, &pkt); |
| if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) |
| return 0; |
| else if (ret < 0) |
| return ret; |
| |
| *poutbuf = av_malloc(pkt.size + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!*poutbuf) { |
| av_packet_unref(&pkt); |
| return AVERROR(ENOMEM); |
| } |
| |
| *poutbuf_size = pkt.size; |
| memcpy(*poutbuf, pkt.data, pkt.size); |
| |
| av_packet_unref(&pkt); |
| |
| /* drain all the remaining packets we cannot return */ |
| while (ret >= 0) { |
| ret = av_bsf_receive_packet(priv->ctx, &pkt); |
| av_packet_unref(&pkt); |
| } |
| |
| if (!priv->extradata_updated) { |
| /* update extradata in avctx from the output codec parameters */ |
| if (priv->ctx->par_out->extradata_size && (!args || !strstr(args, "private_spspps_buf"))) { |
| av_freep(&avctx->extradata); |
| avctx->extradata_size = 0; |
| avctx->extradata = av_mallocz(priv->ctx->par_out->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!avctx->extradata) |
| return AVERROR(ENOMEM); |
| memcpy(avctx->extradata, priv->ctx->par_out->extradata, priv->ctx->par_out->extradata_size); |
| avctx->extradata_size = priv->ctx->par_out->extradata_size; |
| } |
| |
| priv->extradata_updated = 1; |
| } |
| |
| return 1; |
| } |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |