diff options
Diffstat (limited to 'media/ffvpx/libavcodec/bsf.c')
| -rw-r--r-- | media/ffvpx/libavcodec/bsf.c | 542 |
1 files changed, 542 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/bsf.c b/media/ffvpx/libavcodec/bsf.c new file mode 100644 index 000000000..38b423101 --- /dev/null +++ b/media/ffvpx/libavcodec/bsf.c @@ -0,0 +1,542 @@ +/* + * 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 "libavutil/avstring.h" +#include "libavutil/bprint.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 && !pkt->side_data_elems)) { + 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; +} + +int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt) +{ + AVBSFInternal *in = ctx->internal; + + if (in->eof) + return AVERROR_EOF; + + if (!ctx->internal->buffer_pkt->data && + !ctx->internal->buffer_pkt->side_data_elems) + return AVERROR(EAGAIN); + + av_packet_move_ref(pkt, ctx->internal->buffer_pkt); + + return 0; +} + +typedef struct BSFListContext { + const AVClass *class; + + AVBSFContext **bsfs; + int nb_bsfs; + + unsigned idx; // index of currently processed BSF + unsigned flushed_idx; // index of BSF being flushed + + char * item_name; +} BSFListContext; + + +static int bsf_list_init(AVBSFContext *bsf) +{ + BSFListContext *lst = bsf->priv_data; + int ret, i; + const AVCodecParameters *cod_par = bsf->par_in; + AVRational tb = bsf->time_base_in; + + for (i = 0; i < lst->nb_bsfs; ++i) { + ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par); + if (ret < 0) + goto fail; + + lst->bsfs[i]->time_base_in = tb; + + ret = av_bsf_init(lst->bsfs[i]); + if (ret < 0) + goto fail; + + cod_par = lst->bsfs[i]->par_out; + tb = lst->bsfs[i]->time_base_out; + } + + bsf->time_base_out = tb; + ret = avcodec_parameters_copy(bsf->par_out, cod_par); + +fail: + return ret; +} + +static int bsf_list_filter(AVBSFContext *bsf, AVPacket *out) +{ + BSFListContext *lst = bsf->priv_data; + int ret; + + if (!lst->nb_bsfs) + return ff_bsf_get_packet_ref(bsf, out); + + while (1) { + if (lst->idx > lst->flushed_idx) { + ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out); + if (ret == AVERROR(EAGAIN)) { + /* no more packets from idx-1, try with previous */ + ret = 0; + lst->idx--; + continue; + } else if (ret == AVERROR_EOF) { + /* filter idx-1 is done, continue with idx...nb_bsfs */ + lst->flushed_idx = lst->idx; + continue; + }else if (ret < 0) { + /* filtering error */ + break; + } + } else { + ret = ff_bsf_get_packet_ref(bsf, out); + if (ret == AVERROR_EOF) { + lst->idx = lst->flushed_idx; + } else if (ret < 0) + break; + } + + if (lst->idx < lst->nb_bsfs) { + AVPacket *pkt; + if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) { + /* ff_bsf_get_packet_ref returned EOF and idx is first + * filter of yet not flushed filter chain */ + pkt = NULL; + } else { + pkt = out; + } + ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt); + if (ret < 0) + break; + lst->idx++; + } else { + /* The end of filter chain, break to return result */ + break; + } + } + + if (ret < 0) + av_packet_unref(out); + + return ret; +} + +static void bsf_list_close(AVBSFContext *bsf) +{ + BSFListContext *lst = bsf->priv_data; + int i; + + for (i = 0; i < lst->nb_bsfs; ++i) + av_bsf_free(&lst->bsfs[i]); + av_freep(&lst->bsfs); + av_freep(&lst->item_name); +} + +static const char *bsf_list_item_name(void *ctx) +{ + static const char *null_filter_name = "null"; + AVBSFContext *bsf_ctx = ctx; + BSFListContext *lst = bsf_ctx->priv_data; + + if (!lst->nb_bsfs) + return null_filter_name; + + if (!lst->item_name) { + int i; + AVBPrint bp; + av_bprint_init(&bp, 16, 128); + + av_bprintf(&bp, "bsf_list("); + for (i = 0; i < lst->nb_bsfs; i++) + av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name); + av_bprintf(&bp, ")"); + + av_bprint_finalize(&bp, &lst->item_name); + } + + return lst->item_name; +} + +static const AVClass bsf_list_class = { + .class_name = "bsf_list", + .item_name = bsf_list_item_name, + .version = LIBAVUTIL_VERSION_INT, +}; + +const AVBitStreamFilter ff_list_bsf = { + .name = "bsf_list", + .priv_data_size = sizeof(BSFListContext), + .priv_class = &bsf_list_class, + .init = bsf_list_init, + .filter = bsf_list_filter, + .close = bsf_list_close, +}; + +struct AVBSFList { + AVBSFContext **bsfs; + int nb_bsfs; +}; + +AVBSFList *av_bsf_list_alloc(void) +{ + return av_mallocz(sizeof(AVBSFList)); +} + +void av_bsf_list_free(AVBSFList **lst) +{ + int i; + + if (!*lst) + return; + + for (i = 0; i < (*lst)->nb_bsfs; ++i) + av_bsf_free(&(*lst)->bsfs[i]); + av_free((*lst)->bsfs); + av_freep(lst); +} + +int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf) +{ + return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf); +} + +int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary ** options) +{ + int ret; + const AVBitStreamFilter *filter; + AVBSFContext *bsf; + + filter = av_bsf_get_by_name(bsf_name); + if (!filter) + return AVERROR_BSF_NOT_FOUND; + + ret = av_bsf_alloc(filter, &bsf); + if (ret < 0) + return ret; + + if (options) { + ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN); + if (ret < 0) + goto end; + } + + ret = av_bsf_list_append(lst, bsf); + +end: + if (ret < 0) + av_bsf_free(&bsf); + + return ret; +} + +int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf) +{ + int ret = 0; + BSFListContext *ctx; + + if ((*lst)->nb_bsfs == 1) { + *bsf = (*lst)->bsfs[0]; + av_freep(&(*lst)->bsfs); + (*lst)->nb_bsfs = 0; + goto end; + } + + ret = av_bsf_alloc(&ff_list_bsf, bsf); + if (ret < 0) + return ret; + + ctx = (*bsf)->priv_data; + + ctx->bsfs = (*lst)->bsfs; + ctx->nb_bsfs = (*lst)->nb_bsfs; + +end: + av_freep(lst); + return ret; +} + +static int bsf_parse_single(const char *str, AVBSFList *bsf_lst) +{ + char *bsf_name, *bsf_options_str, *buf; + AVDictionary *bsf_options = NULL; + int ret = 0; + + if (!(buf = av_strdup(str))) + return AVERROR(ENOMEM); + + bsf_name = av_strtok(buf, "=", &bsf_options_str); + if (!bsf_name) { + ret = AVERROR(EINVAL); + goto end; + } + + if (bsf_options_str) { + ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0); + if (ret < 0) + goto end; + } + + ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options); + + av_dict_free(&bsf_options); +end: + av_free(buf); + return ret; +} + +int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst) +{ + AVBSFList *lst; + char *bsf_str, *buf, *dup, *saveptr; + int ret; + + if (!str) + return av_bsf_get_null_filter(bsf_lst); + + lst = av_bsf_list_alloc(); + if (!lst) + return AVERROR(ENOMEM); + + if (!(dup = buf = av_strdup(str))) { + ret = AVERROR(ENOMEM); + goto end; + } + + while (1) { + bsf_str = av_strtok(buf, ",", &saveptr); + if (!bsf_str) + break; + + ret = bsf_parse_single(bsf_str, lst); + if (ret < 0) + goto end; + + buf = NULL; + } + + ret = av_bsf_list_finalize(&lst, bsf_lst); +end: + if (ret < 0) + av_bsf_list_free(&lst); + av_free(dup); + return ret; +} + +int av_bsf_get_null_filter(AVBSFContext **bsf) +{ + return av_bsf_alloc(&ff_list_bsf, bsf); +} |