diff options
Diffstat (limited to 'media/ffvpx/libavcodec/bsf.c')
| -rw-r--r-- | media/ffvpx/libavcodec/bsf.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/bsf.c b/media/ffvpx/libavcodec/bsf.c new file mode 100644 index 000000000..88b7f29fe --- /dev/null +++ b/media/ffvpx/libavcodec/bsf.c @@ -0,0 +1,219 @@ +/* + * 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 "libavutil/log.h" +#include "libavutil/mem.h" +#include "libavutil/opt.h" + +#include "avcodec.h" +#include "bsf.h" + +struct AVBSFInternal { + AVPacket *buffer_pkt; + int eof; +}; + +void av_bsf_free(AVBSFContext **pctx) +{ + AVBSFContext *ctx; + + if (!pctx || !*pctx) + return; + ctx = *pctx; + + if (ctx->filter->close) + ctx->filter->close(ctx); + if (ctx->filter->priv_class && ctx->priv_data) + av_opt_free(ctx->priv_data); + + av_opt_free(ctx); + + av_packet_free(&ctx->internal->buffer_pkt); + av_freep(&ctx->internal); + av_freep(&ctx->priv_data); + + avcodec_parameters_free(&ctx->par_in); + avcodec_parameters_free(&ctx->par_out); + + av_freep(pctx); +} + +static void *bsf_child_next(void *obj, void *prev) +{ + AVBSFContext *ctx = obj; + if (!prev && ctx->filter->priv_class) + return ctx->priv_data; + return NULL; +} + +static const AVClass bsf_class = { + .class_name = "AVBSFContext", + .item_name = av_default_item_name, + .version = LIBAVUTIL_VERSION_INT, + .child_next = bsf_child_next, + .child_class_next = ff_bsf_child_class_next, +}; + +const AVClass *av_bsf_get_class(void) +{ + return &bsf_class; +} + +int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx) +{ + AVBSFContext *ctx; + int ret; + + ctx = av_mallocz(sizeof(*ctx)); + if (!ctx) + return AVERROR(ENOMEM); + + ctx->av_class = &bsf_class; + ctx->filter = filter; + + ctx->par_in = avcodec_parameters_alloc(); + ctx->par_out = avcodec_parameters_alloc(); + if (!ctx->par_in || !ctx->par_out) { + ret = AVERROR(ENOMEM); + goto fail; + } + + ctx->internal = av_mallocz(sizeof(*ctx->internal)); + if (!ctx->internal) { + ret = AVERROR(ENOMEM); + goto fail; + } + + ctx->internal->buffer_pkt = av_packet_alloc(); + if (!ctx->internal->buffer_pkt) { + ret = AVERROR(ENOMEM); + goto fail; + } + + av_opt_set_defaults(ctx); + + /* allocate priv data and init private options */ + if (filter->priv_data_size) { + ctx->priv_data = av_mallocz(filter->priv_data_size); + if (!ctx->priv_data) { + ret = AVERROR(ENOMEM); + goto fail; + } + if (filter->priv_class) { + *(const AVClass **)ctx->priv_data = filter->priv_class; + av_opt_set_defaults(ctx->priv_data); + } + } + + *pctx = ctx; + return 0; +fail: + av_bsf_free(&ctx); + return ret; +} + +int av_bsf_init(AVBSFContext *ctx) +{ + int ret, i; + + /* check that the codec is supported */ + if (ctx->filter->codec_ids) { + for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) + if (ctx->par_in->codec_id == ctx->filter->codec_ids[i]) + break; + if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) { + const AVCodecDescriptor *desc = avcodec_descriptor_get(ctx->par_in->codec_id); + av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the " + "bitstream filter '%s'. Supported codecs are: ", + desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name); + for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) { + desc = avcodec_descriptor_get(ctx->filter->codec_ids[i]); + av_log(ctx, AV_LOG_ERROR, "%s (%d) ", + desc ? desc->name : "unknown", ctx->filter->codec_ids[i]); + } + av_log(ctx, AV_LOG_ERROR, "\n"); + return AVERROR(EINVAL); + } + } + + /* initialize output parameters to be the same as input + * init below might overwrite that */ + ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in); + if (ret < 0) + return ret; + + ctx->time_base_out = ctx->time_base_in; + + if (ctx->filter->init) { + ret = ctx->filter->init(ctx); + if (ret < 0) + return ret; + } + + return 0; +} + +int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt) +{ + if (!pkt || !pkt->data) { + ctx->internal->eof = 1; + return 0; + } + + if (ctx->internal->eof) { + av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n"); + return AVERROR(EINVAL); + } + + if (ctx->internal->buffer_pkt->data || + ctx->internal->buffer_pkt->side_data_elems) + return AVERROR(EAGAIN); + + av_packet_move_ref(ctx->internal->buffer_pkt, pkt); + + return 0; +} + +int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt) +{ + return ctx->filter->filter(ctx, pkt); +} + +int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt) +{ + AVBSFInternal *in = ctx->internal; + AVPacket *tmp_pkt; + + if (in->eof) + return AVERROR_EOF; + + if (!ctx->internal->buffer_pkt->data && + !ctx->internal->buffer_pkt->side_data_elems) + return AVERROR(EAGAIN); + + tmp_pkt = av_packet_alloc(); + if (!tmp_pkt) + return AVERROR(ENOMEM); + + *pkt = ctx->internal->buffer_pkt; + ctx->internal->buffer_pkt = tmp_pkt; + + return 0; +} |