#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
#include "avcodec.h"
#include "bsf.h"
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
{
- if (!pkt || !pkt->data) {
+ if (!pkt) {
ctx->internal->eof = 1;
return 0;
}
+ av_assert0(pkt->data || pkt->side_data);
+
if (ctx->internal->eof) {
av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
return AVERROR(EINVAL);
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)))
+ return AVERROR(ENOMEM);
+
+ 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);
+}
projects / ffmpeg / blobdiff