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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /media/ffvpx/libavcodec/bsf.c | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/bsf.c | 562 |
1 files changed, 562 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/bsf.c b/media/ffvpx/libavcodec/bsf.c new file mode 100644 index 0000000000..42cc1b5ab0 --- /dev/null +++ b/media/ffvpx/libavcodec/bsf.c @@ -0,0 +1,562 @@ +/* + * 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 "config_components.h" + +#include "libavutil/avassert.h" +#include "libavutil/log.h" +#include "libavutil/mem.h" +#include "libavutil/opt.h" +#include "libavutil/avstring.h" +#include "libavutil/bprint.h" + +#include "bsf.h" +#include "bsf_internal.h" +#include "codec_desc.h" +#include "codec_par.h" + +#define IS_EMPTY(pkt) (!(pkt)->data && !(pkt)->side_data_elems) + +static av_always_inline const FFBitStreamFilter *ff_bsf(const AVBitStreamFilter *bsf) +{ + return (const FFBitStreamFilter*)bsf; +} + +typedef struct FFBSFContext { + AVBSFContext pub; + AVPacket *buffer_pkt; + int eof; +} FFBSFContext; + +static av_always_inline FFBSFContext *ffbsfcontext(AVBSFContext *ctx) +{ + return (FFBSFContext *)ctx; +} + +void av_bsf_free(AVBSFContext **pctx) +{ + AVBSFContext *ctx; + FFBSFContext *bsfi; + + if (!pctx || !*pctx) + return; + ctx = *pctx; + bsfi = ffbsfcontext(ctx); + + if (ctx->priv_data) { + if (ff_bsf(ctx->filter)->close) + ff_bsf(ctx->filter)->close(ctx); + if (ctx->filter->priv_class) + av_opt_free(ctx->priv_data); + av_freep(&ctx->priv_data); + } + av_packet_free(&bsfi->buffer_pkt); + + 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 char *bsf_to_name(void *bsf) +{ + return ((AVBSFContext *)bsf)->filter->name; +} + +static const AVClass bsf_class = { + .class_name = "AVBSFContext", + .item_name = bsf_to_name, + .version = LIBAVUTIL_VERSION_INT, + .child_next = bsf_child_next, + .child_class_iterate = ff_bsf_child_class_iterate, + .category = AV_CLASS_CATEGORY_BITSTREAM_FILTER, +}; + +const AVClass *av_bsf_get_class(void) +{ + return &bsf_class; +} + +int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx) +{ + AVBSFContext *ctx; + FFBSFContext *bsfi; + int ret; + + bsfi = av_mallocz(sizeof(*bsfi)); + if (!bsfi) + return AVERROR(ENOMEM); + ctx = &bsfi->pub; + + 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; + } + /* allocate priv data and init private options */ + if (ff_bsf(filter)->priv_data_size) { + ctx->priv_data = av_mallocz(ff_bsf(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); + } + } + bsfi->buffer_pkt = av_packet_alloc(); + if (!bsfi->buffer_pkt) { + ret = AVERROR(ENOMEM); + goto fail; + } + + *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++) { + enum AVCodecID codec_id = ctx->filter->codec_ids[i]; + av_log(ctx, AV_LOG_ERROR, "%s (%d) ", + avcodec_get_name(codec_id), codec_id); + } + 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 (ff_bsf(ctx->filter)->init) { + ret = ff_bsf(ctx->filter)->init(ctx); + if (ret < 0) + return ret; + } + + return 0; +} + +void av_bsf_flush(AVBSFContext *ctx) +{ + FFBSFContext *const bsfi = ffbsfcontext(ctx); + + bsfi->eof = 0; + + av_packet_unref(bsfi->buffer_pkt); + + if (ff_bsf(ctx->filter)->flush) + ff_bsf(ctx->filter)->flush(ctx); +} + +int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt) +{ + FFBSFContext *const bsfi = ffbsfcontext(ctx); + int ret; + + if (!pkt || IS_EMPTY(pkt)) { + if (pkt) + av_packet_unref(pkt); + bsfi->eof = 1; + return 0; + } + + if (bsfi->eof) { + av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n"); + return AVERROR(EINVAL); + } + + if (!IS_EMPTY(bsfi->buffer_pkt)) + return AVERROR(EAGAIN); + + ret = av_packet_make_refcounted(pkt); + if (ret < 0) + return ret; + av_packet_move_ref(bsfi->buffer_pkt, pkt); + + return 0; +} + +int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt) +{ + return ff_bsf(ctx->filter)->filter(ctx, pkt); +} + +int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt) +{ + FFBSFContext *const bsfi = ffbsfcontext(ctx); + AVPacket *tmp_pkt; + + if (bsfi->eof) + return AVERROR_EOF; + + if (IS_EMPTY(bsfi->buffer_pkt)) + return AVERROR(EAGAIN); + + tmp_pkt = av_packet_alloc(); + if (!tmp_pkt) + return AVERROR(ENOMEM); + + *pkt = bsfi->buffer_pkt; + bsfi->buffer_pkt = tmp_pkt; + + return 0; +} + +int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt) +{ + FFBSFContext *const bsfi = ffbsfcontext(ctx); + + if (bsfi->eof) + return AVERROR_EOF; + + if (IS_EMPTY(bsfi->buffer_pkt)) + return AVERROR(EAGAIN); + + av_packet_move_ref(pkt, bsfi->buffer_pkt); + + return 0; +} + +typedef struct BSFListContext { + const AVClass *class; + + AVBSFContext **bsfs; + int nb_bsfs; + + unsigned idx; // index of currently processed BSF + + 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, eof = 0; + + if (!lst->nb_bsfs) + return ff_bsf_get_packet_ref(bsf, out); + + while (1) { + /* get a packet from the previous filter up the chain */ + if (lst->idx) + ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out); + else + ret = ff_bsf_get_packet_ref(bsf, out); + if (ret == AVERROR(EAGAIN)) { + if (!lst->idx) + return ret; + lst->idx--; + continue; + } else if (ret == AVERROR_EOF) { + eof = 1; + } else if (ret < 0) + return ret; + + /* send it to the next filter down the chain */ + if (lst->idx < lst->nb_bsfs) { + ret = av_bsf_send_packet(lst->bsfs[lst->idx], eof ? NULL : out); + av_assert1(ret != AVERROR(EAGAIN)); + if (ret < 0) { + av_packet_unref(out); + return ret; + } + lst->idx++; + eof = 0; + } else if (eof) { + return ret; + } else { + return 0; + } + } +} + +static void bsf_list_flush(AVBSFContext *bsf) +{ + BSFListContext *lst = bsf->priv_data; + + for (int i = 0; i < lst->nb_bsfs; i++) + av_bsf_flush(lst->bsfs[i]); + lst->idx = 0; +} + +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, +}; + +static const FFBitStreamFilter list_bsf = { + .p.name = "bsf_list", + .p.priv_class = &bsf_list_class, + .priv_data_size = sizeof(BSFListContext), + .init = bsf_list_init, + .filter = bsf_list_filter, + .flush = bsf_list_flush, + .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); +} + +static int bsf_list_append_internal(AVBSFList *lst, const char *bsf_name, const char *options, AVDictionary ** options_dict) +{ + 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 && filter->priv_class) { + const AVOption *opt = av_opt_next(bsf->priv_data, NULL); + const char * shorthand[2] = {NULL}; + + if (opt) + shorthand[0] = opt->name; + + ret = av_opt_set_from_string(bsf->priv_data, options, shorthand, "=", ":"); + if (ret < 0) + goto end; + } + + if (options_dict) { + ret = av_opt_set_dict2(bsf, options_dict, 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_append2(AVBSFList *lst, const char *bsf_name, AVDictionary ** options) +{ + return bsf_list_append_internal(lst, bsf_name, NULL, options); +} + +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(&list_bsf.p, 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(char *str, AVBSFList *bsf_lst) +{ + char *bsf_name, *bsf_options_str; + + bsf_name = av_strtok(str, "=", &bsf_options_str); + if (!bsf_name) + return AVERROR(EINVAL); + + return bsf_list_append_internal(bsf_lst, bsf_name, bsf_options_str, NULL); +} + +int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst) +{ + AVBSFList *lst; + int ret; + + if (!str) + return av_bsf_get_null_filter(bsf_lst); + + lst = av_bsf_list_alloc(); + if (!lst) + return AVERROR(ENOMEM); + + do { + char *bsf_str = av_get_token(&str, ","); + ret = bsf_parse_single(bsf_str, lst); + av_free(bsf_str); + if (ret < 0) + goto end; + } while (*str && *++str); + + ret = av_bsf_list_finalize(&lst, bsf_lst); +end: + if (ret < 0) + av_bsf_list_free(&lst); + return ret; +} + +int av_bsf_get_null_filter(AVBSFContext **bsf) +{ +#if CONFIG_NULL_BSF + extern const FFBitStreamFilter ff_null_bsf; + return av_bsf_alloc(&ff_null_bsf.p, bsf); +#else + return av_bsf_alloc(&list_bsf.p, bsf); +#endif +} |