/*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * 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/avassert.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"
+#include "bsf_internal.h"
+#include "codec_desc.h"
+#include "codec_par.h"
+
+#define IS_EMPTY(pkt) (!(pkt)->data && !(pkt)->side_data_elems)
struct AVBSFInternal {
AVPacket *buffer_pkt;
return;
ctx = *pctx;
- if (ctx->filter->close)
- ctx->filter->close(ctx);
+ if (ctx->internal) {
+ if (ctx->filter->close)
+ ctx->filter->close(ctx);
+ av_packet_free(&ctx->internal->buffer_pkt);
+ av_freep(&ctx->internal);
+ }
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);
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 = av_default_item_name,
+ .item_name = bsf_to_name,
.version = LIBAVUTIL_VERSION_INT,
.child_next = bsf_child_next,
- .child_class_next = ff_bsf_child_class_next,
+ .child_class_iterate = ff_bsf_child_class_iterate,
+ .category = AV_CLASS_CATEGORY_BITSTREAM_FILTER,
};
const AVClass *av_bsf_get_class(void)
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
{
AVBSFContext *ctx;
+ AVBSFInternal *bsfi;
int ret;
ctx = av_mallocz(sizeof(*ctx));
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);
av_opt_set_defaults(ctx->priv_data);
}
}
+ /* Allocate AVBSFInternal; must happen after priv_data has been allocated
+ * so that a filter->close needing priv_data is never called without. */
+ bsfi = av_mallocz(sizeof(*bsfi));
+ if (!bsfi) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ ctx->internal = bsfi;
+
+ bsfi->buffer_pkt = av_packet_alloc();
+ if (!bsfi->buffer_pkt) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
*pctx = ctx;
return 0;
"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]);
+ enum AVCodecID codec_id = ctx->filter->codec_ids[i];
av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
- desc ? desc->name : "unknown", ctx->filter->codec_ids[i]);
+ avcodec_get_name(codec_id), codec_id);
}
av_log(ctx, AV_LOG_ERROR, "\n");
return AVERROR(EINVAL);
void av_bsf_flush(AVBSFContext *ctx)
{
- ctx->internal->eof = 0;
+ AVBSFInternal *bsfi = ctx->internal;
- av_packet_unref(ctx->internal->buffer_pkt);
+ bsfi->eof = 0;
+
+ av_packet_unref(bsfi->buffer_pkt);
if (ctx->filter->flush)
ctx->filter->flush(ctx);
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
{
- if (!pkt || !pkt->data) {
- ctx->internal->eof = 1;
+ AVBSFInternal *bsfi = ctx->internal;
+ int ret;
+
+ if (!pkt || IS_EMPTY(pkt)) {
+ bsfi->eof = 1;
return 0;
}
- if (ctx->internal->eof) {
+ if (bsfi->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)
+ if (!IS_EMPTY(bsfi->buffer_pkt))
return AVERROR(EAGAIN);
- av_packet_move_ref(ctx->internal->buffer_pkt, pkt);
+ ret = av_packet_make_refcounted(pkt);
+ if (ret < 0)
+ return ret;
+ av_packet_move_ref(bsfi->buffer_pkt, pkt);
return 0;
}
int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
{
- AVBSFInternal *in = ctx->internal;
+ AVBSFInternal *bsfi = ctx->internal;
AVPacket *tmp_pkt;
- if (in->eof)
+ if (bsfi->eof)
return AVERROR_EOF;
- if (!ctx->internal->buffer_pkt->data &&
- !ctx->internal->buffer_pkt->side_data_elems)
+ if (IS_EMPTY(bsfi->buffer_pkt))
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;
+ *pkt = bsfi->buffer_pkt;
+ bsfi->buffer_pkt = tmp_pkt;
return 0;
}
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
{
- AVBSFInternal *in = ctx->internal;
+ AVBSFInternal *bsfi = ctx->internal;
- if (in->eof)
+ if (bsfi->eof)
return AVERROR_EOF;
- if (!ctx->internal->buffer_pkt->data &&
- !ctx->internal->buffer_pkt->side_data_elems)
+ if (IS_EMPTY(bsfi->buffer_pkt))
return AVERROR(EAGAIN);
- av_packet_move_ref(pkt, ctx->internal->buffer_pkt);
+ 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,
+};
+
+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,
+ .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(&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(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;
+ 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 (bsf_str = av_strtok(buf, ",", &saveptr)) {
+ 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);
+}
projects / ffmpeg / blobdiff