Merge commit '33d18982fa03feb061c8f744a4f0a9175c1f63ab'

* commit '33d18982fa03feb061c8f744a4f0a9175c1f63ab':
  lavc: add a new bitstream filtering API

Conversions-by: Hendrik Leppkes <h.leppkes@gmail.com>
Conversions-by: Derek Buitenguis <derek.buitenhuis@gmail.com>
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

1 files changed, 137 insertions, 0 deletions

diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c
new file mode 100644
index 0000000000..51f3cd9799
--- /dev/null
+++ b/libavcodec/bitstream_filters.c
@@ -0,0 +1,137 @@
+/*
+ * 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 "config.h"
+
+#include "libavutil/common.h"
+#include "libavutil/log.h"
+
+#include "avcodec.h"
+#include "bsf.h"
+
+extern const AVBitStreamFilter ff_aac_adtstoasc_bsf;
+extern const AVBitStreamFilter ff_chomp_bsf;
+extern const AVBitStreamFilter ff_dump_extradata_bsf;
+extern const AVBitStreamFilter ff_dca_core_bsf;
+extern const AVBitStreamFilter ff_h264_mp4toannexb_bsf;
+extern const AVBitStreamFilter ff_hevc_mp4toannexb_bsf;
+extern const AVBitStreamFilter ff_imx_dump_header_bsf;
+extern const AVBitStreamFilter ff_mjpeg2jpeg_bsf;
+extern const AVBitStreamFilter ff_mjpega_dump_header_bsf;
+extern const AVBitStreamFilter ff_mp3_header_decompress_bsf;
+extern const AVBitStreamFilter ff_mpeg4_unpack_bframes_bsf;
+extern const AVBitStreamFilter ff_mov2textsub_bsf;
+extern const AVBitStreamFilter ff_noise_bsf;
+extern const AVBitStreamFilter ff_remove_extradata_bsf;
+extern const AVBitStreamFilter ff_text2movsub_bsf;
+extern const AVBitStreamFilter ff_vp9_superframe_bsf;
+
+static const AVBitStreamFilter *bitstream_filters[] = {
+#if CONFIG_AAC_ADTSTOASC_BSF
+    &ff_aac_adtstoasc_bsf,
+#endif
+#if CONFIG_CHOMP_BSF
+    &ff_chomp_bsf,
+#endif
+#if CONFIG_DUMP_EXTRADATA_BSF
+    &ff_dump_extradata_bsf,
+#endif
+#if CONFIG_DCA_CORE_BSF
+    &ff_dca_core_bsf,
+#endif
+#if CONFIG_H264_MP4TOANNEXB_BSF
+    &ff_h264_mp4toannexb_bsf,
+#endif
+#if CONFIG_HEVC_MP4TOANNEXB_BSF
+    &ff_hevc_mp4toannexb_bsf,
+#endif
+#if CONFIG_IMX_DUMP_HEADER_BSF
+    &ff_imx_dump_header_bsf,
+#endif
+#if CONFIG_MJPEG2JPEG_BSF
+    &ff_mjpeg2jpeg_bsf,
+#endif
+#if CONFIG_MJPEGA_DUMP_HEADER_BSF
+    &ff_mjpega_dump_header_bsf,
+#endif
+#if CONFIG_MP3_HEADER_DECOMPRESS_BSF
+    &ff_mp3_header_decompress_bsf,
+#endif
+#if CONFIG_MPEG4_UNPACK_BFRAMES_BSF
+    &ff_mpeg4_unpack_bframes_bsf,
+#endif
+#if CONFIG_MOV2TEXTSUB_BSF
+    &ff_mov2textsub_bsf,
+#endif
+#if CONFIG_NOISE_BSF
+    &ff_noise_bsf,
+#endif
+#if CONFIG_REMOVE_EXTRADATA_BSF
+    &ff_remove_extradata_bsf,
+#endif
+#if CONFIG_TEXT2MOVSUB_BSF
+    &ff_text2movsub_bsf,
+#endif
+#if CONFIG_VP9_SUPERFRAME_BSF
+    &ff_vp9_superframe_bsf,
+#endif
+    NULL,
+};
+
+const AVBitStreamFilter *av_bsf_next(void **opaque)
+{
+    uintptr_t i = (uintptr_t)*opaque;
+    const AVBitStreamFilter *f = bitstream_filters[i];
+
+    if (f)
+        *opaque = (void*)(i + 1);
+
+    return f;
+}
+
+const AVBitStreamFilter *av_bsf_get_by_name(const char *name)
+{
+    int i;
+
+    for (i = 0; bitstream_filters[i]; i++) {
+        const AVBitStreamFilter *f = bitstream_filters[i];
+        if (!strcmp(f->name, name))
+            return f;
+    }
+
+    return NULL;
+}
+
+const AVClass *ff_bsf_child_class_next(const AVClass *prev)
+{
+    int i;
+
+    /* find the filter that corresponds to prev */
+    for (i = 0; prev && bitstream_filters[i]; i++) {
+        if (bitstream_filters[i]->priv_class == prev) {
+            i++;
+            break;
+        }
+    }
+
+    /* find next filter with priv options */
+    for (; bitstream_filters[i]; i++)
+        if (bitstream_filters[i]->priv_class)
+            return bitstream_filters[i]->priv_class;
+    return NULL;
+}