@@ -3,6 +3,7 @@ DESC = FFmpeg container format library
HEADERS = avformat.h \
avio.h \
+ hls_utils.h \
version.h \
version_major.h \
@@ -15,6 +16,7 @@ OBJS = allformats.o \
dump.o \
dv.o \
format.o \
+ hls_utils.o \
id3v1.o \
id3v2.o \
isom_tags.o \
new file mode 100644
@@ -0,0 +1,105 @@
+/*
+ * HLS public API
+ *
+ * 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 "hls_utils.h"
+#include "libavutil/intreadwrite.h"
+#include "avc.h"
+
+int av_hls_codec_attr(AVStream *st, char *attr, size_t attr_len) {
+ if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
+ uint8_t *data = st->codecpar->extradata;
+ if (data) {
+ const uint8_t *p;
+
+ if (AV_RB32(data) == 0x01 && (data[4] & 0x1F) == 7)
+ p = &data[5];
+ else if (AV_RB24(data) == 0x01 && (data[3] & 0x1F) == 7)
+ p = &data[4];
+ else if (data[0] == 0x01) /* avcC */
+ p = &data[1];
+ else
+ return AVERROR_INVALIDDATA;
+ snprintf(attr, attr_len,
+ "avc1.%02x%02x%02x", p[0], p[1], p[2]);
+ } else {
+ return AVERROR_INVALIDDATA;
+ }
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
+ uint8_t *data = st->codecpar->extradata;
+ int profile = AV_PROFILE_UNKNOWN;
+ int level = AV_LEVEL_UNKNOWN;
+
+ if (st->codecpar->profile != AV_PROFILE_UNKNOWN)
+ profile = st->codecpar->profile;
+ if (st->codecpar->level != AV_LEVEL_UNKNOWN)
+ level = st->codecpar->level;
+
+ /* check the boundary of data which from current position is small than extradata_size */
+ while (data && (data - st->codecpar->extradata + 19) < st->codecpar->extradata_size) {
+ /* get HEVC SPS NAL and seek to profile_tier_level */
+ if (!(data[0] | data[1] | data[2]) && data[3] == 1 && ((data[4] & 0x7E) == 0x42)) {
+ uint8_t *rbsp_buf;
+ int remain_size = 0;
+ int rbsp_size = 0;
+ /* skip start code + nalu header */
+ data += 6;
+ /* process by reference General NAL unit syntax */
+ remain_size = st->codecpar->extradata_size - (data - st->codecpar->extradata);
+ rbsp_buf = ff_nal_unit_extract_rbsp(data, remain_size, &rbsp_size, 0);
+ if (!rbsp_buf)
+ return AVERROR_INVALIDDATA;
+ if (rbsp_size < 13) {
+ av_freep(&rbsp_buf);
+ break;
+ }
+ /* skip sps_video_parameter_set_id u(4),
+ * sps_max_sub_layers_minus1 u(3),
+ * and sps_temporal_id_nesting_flag u(1) */
+ profile = rbsp_buf[1] & 0x1f;
+ /* skip 8 + 8 + 32 + 4 + 43 + 1 bit */
+ level = rbsp_buf[12];
+ av_freep(&rbsp_buf);
+ break;
+ }
+ data++;
+ }
+ if (st->codecpar->codec_tag == MKTAG('h','v','c','1') &&
+ profile != AV_PROFILE_UNKNOWN &&
+ level != AV_LEVEL_UNKNOWN) {
+ snprintf(attr, attr_len, "%s.%d.4.L%d.B01", av_fourcc2str(st->codecpar->codec_tag), profile, level);
+ } else
+ return AVERROR_INVALIDDATA;
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
+ snprintf(attr, attr_len, "mp4a.40.33");
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
+ snprintf(attr, attr_len, "mp4a.40.34");
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
+ /* TODO : For HE-AAC, HE-AACv2, the last digit needs to be set to 5 and 29 respectively */
+ snprintf(attr, attr_len, "mp4a.40.2");
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
+ snprintf(attr, attr_len, "ac-3");
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_EAC3) {
+ snprintf(attr, attr_len, "ec-3");
+ } else {
+ return AVERROR_INVALIDDATA;
+ }
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,42 @@
+/*
+ * HLS public API
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * A public API for HLS codec information
+ */
+
+#ifndef AVCODEC_HLS_UTILS_H
+#define AVCODEC_HLS_UTILS_H
+
+#include "libavformat/avformat.h"
+
+/**
+ * Write a NULL-terminated string representing the codec attributes
+ * associated with the given AVStream.
+ *
+ * @param st stream to extract codec attributes from
+ * @param attr buffer to write to wanted payload size
+ * @param attr_len size of the buffer
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hls_codec_attr(AVStream *st, char *attr, size_t attr_len);
+
+#endif
@@ -48,6 +48,7 @@
#include "http.h"
#endif
#include "hlsplaylist.h"
+#include "hls_utils.h"
#include "internal.h"
#include "mux.h"
#include "os_support.h"
@@ -344,89 +345,17 @@ static void write_codec_attr(AVStream *st, VariantStream *vs)
{
int codec_strlen = strlen(vs->codec_attr);
char attr[32];
+ int ret;
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
return;
if (vs->attr_status == CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN)
return;
- if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
- uint8_t *data = st->codecpar->extradata;
- if (data) {
- const uint8_t *p;
-
- if (AV_RB32(data) == 0x01 && (data[4] & 0x1F) == 7)
- p = &data[5];
- else if (AV_RB24(data) == 0x01 && (data[3] & 0x1F) == 7)
- p = &data[4];
- else if (data[0] == 0x01) /* avcC */
- p = &data[1];
- else
- goto fail;
- snprintf(attr, sizeof(attr),
- "avc1.%02x%02x%02x", p[0], p[1], p[2]);
- } else {
- goto fail;
- }
- } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
- uint8_t *data = st->codecpar->extradata;
- int profile = AV_PROFILE_UNKNOWN;
- int level = AV_LEVEL_UNKNOWN;
-
- if (st->codecpar->profile != AV_PROFILE_UNKNOWN)
- profile = st->codecpar->profile;
- if (st->codecpar->level != AV_LEVEL_UNKNOWN)
- level = st->codecpar->level;
-
- /* check the boundary of data which from current position is small than extradata_size */
- while (data && (data - st->codecpar->extradata + 19) < st->codecpar->extradata_size) {
- /* get HEVC SPS NAL and seek to profile_tier_level */
- if (!(data[0] | data[1] | data[2]) && data[3] == 1 && ((data[4] & 0x7E) == 0x42)) {
- uint8_t *rbsp_buf;
- int remain_size = 0;
- int rbsp_size = 0;
- /* skip start code + nalu header */
- data += 6;
- /* process by reference General NAL unit syntax */
- remain_size = st->codecpar->extradata_size - (data - st->codecpar->extradata);
- rbsp_buf = ff_nal_unit_extract_rbsp(data, remain_size, &rbsp_size, 0);
- if (!rbsp_buf)
- return;
- if (rbsp_size < 13) {
- av_freep(&rbsp_buf);
- break;
- }
- /* skip sps_video_parameter_set_id u(4),
- * sps_max_sub_layers_minus1 u(3),
- * and sps_temporal_id_nesting_flag u(1) */
- profile = rbsp_buf[1] & 0x1f;
- /* skip 8 + 8 + 32 + 4 + 43 + 1 bit */
- level = rbsp_buf[12];
- av_freep(&rbsp_buf);
- break;
- }
- data++;
- }
- if (st->codecpar->codec_tag == MKTAG('h','v','c','1') &&
- profile != AV_PROFILE_UNKNOWN &&
- level != AV_LEVEL_UNKNOWN) {
- snprintf(attr, sizeof(attr), "%s.%d.4.L%d.B01", av_fourcc2str(st->codecpar->codec_tag), profile, level);
- } else
- goto fail;
- } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
- snprintf(attr, sizeof(attr), "mp4a.40.33");
- } else if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
- snprintf(attr, sizeof(attr), "mp4a.40.34");
- } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
- /* TODO : For HE-AAC, HE-AACv2, the last digit needs to be set to 5 and 29 respectively */
- snprintf(attr, sizeof(attr), "mp4a.40.2");
- } else if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
- snprintf(attr, sizeof(attr), "ac-3");
- } else if (st->codecpar->codec_id == AV_CODEC_ID_EAC3) {
- snprintf(attr, sizeof(attr), "ec-3");
- } else {
- goto fail;
- }
+ ret = av_hls_codec_attr(st, attr, sizeof(attr));
+ if (ret < 0)
+ goto fail;
+
// Don't write the same attribute multiple times
if (!av_stristr(vs->codec_attr, attr)) {
snprintf(vs->codec_attr + codec_strlen,