1 files changed, 561 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/bsf.c b/media/ffvpx/libavcodec/bsf.c
new file mode 100644
index 0000000000..1e710f7d4a
--- /dev/null
+++ b/media/ffvpx/libavcodec/bsf.c
@@ -0,0 +1,561 @@
+/*
+ * 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"
+#include "packet_internal.h"
+
+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 || AVPACKET_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 (!AVPACKET_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 (AVPACKET_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 (AVPACKET_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
+}