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-rw-r--r--media/ffvpx/libavcodec/bsf.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/bsf.c b/media/ffvpx/libavcodec/bsf.c
new file mode 100644
index 000000000..88b7f29fe
--- /dev/null
+++ b/media/ffvpx/libavcodec/bsf.c
@@ -0,0 +1,219 @@
+/*
+ * 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 "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) {
+ 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;
+}