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Diffstat (limited to 'ffmpeg/libavformat/rtpdec_mpeg4.c')
-rw-r--r--ffmpeg/libavformat/rtpdec_mpeg4.c279
1 files changed, 0 insertions, 279 deletions
diff --git a/ffmpeg/libavformat/rtpdec_mpeg4.c b/ffmpeg/libavformat/rtpdec_mpeg4.c
deleted file mode 100644
index 0ea5594..0000000
--- a/ffmpeg/libavformat/rtpdec_mpeg4.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * Common code for the RTP depacketization of MPEG-4 formats.
- * Copyright (c) 2010 Fabrice Bellard
- * Romain Degez
- *
- * 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
- * @brief MPEG4 / RTP Code
- * @author Fabrice Bellard
- * @author Romain Degez
- */
-
-#include "rtpdec_formats.h"
-#include "internal.h"
-#include "libavutil/attributes.h"
-#include "libavutil/avstring.h"
-#include "libavcodec/get_bits.h"
-
-/** Structure listing useful vars to parse RTP packet payload */
-struct PayloadContext {
- int sizelength;
- int indexlength;
- int indexdeltalength;
- int profile_level_id;
- int streamtype;
- int objecttype;
- char *mode;
-
- /** mpeg 4 AU headers */
- struct AUHeaders {
- int size;
- int index;
- int cts_flag;
- int cts;
- int dts_flag;
- int dts;
- int rap_flag;
- int streamstate;
- } *au_headers;
- int au_headers_allocated;
- int nb_au_headers;
- int au_headers_length_bytes;
- int cur_au_index;
-
- uint8_t buf[RTP_MAX_PACKET_LENGTH];
- int buf_pos, buf_size;
-};
-
-typedef struct {
- const char *str;
- uint16_t type;
- uint32_t offset;
-} AttrNameMap;
-
-/* All known fmtp parameters and the corresponding RTPAttrTypeEnum */
-#define ATTR_NAME_TYPE_INT 0
-#define ATTR_NAME_TYPE_STR 1
-static const AttrNameMap attr_names[] = {
- { "SizeLength", ATTR_NAME_TYPE_INT,
- offsetof(PayloadContext, sizelength) },
- { "IndexLength", ATTR_NAME_TYPE_INT,
- offsetof(PayloadContext, indexlength) },
- { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
- offsetof(PayloadContext, indexdeltalength) },
- { "profile-level-id", ATTR_NAME_TYPE_INT,
- offsetof(PayloadContext, profile_level_id) },
- { "StreamType", ATTR_NAME_TYPE_INT,
- offsetof(PayloadContext, streamtype) },
- { "mode", ATTR_NAME_TYPE_STR,
- offsetof(PayloadContext, mode) },
- { NULL, -1, -1 },
-};
-
-static PayloadContext *new_context(void)
-{
- return av_mallocz(sizeof(PayloadContext));
-}
-
-static void free_context(PayloadContext *data)
-{
- av_free(data->au_headers);
- av_free(data->mode);
- av_free(data);
-}
-
-static int parse_fmtp_config(AVCodecContext *codec, char *value)
-{
- /* decode the hexa encoded parameter */
- int len = ff_hex_to_data(NULL, value);
- av_free(codec->extradata);
- if (ff_alloc_extradata(codec, len))
- return AVERROR(ENOMEM);
- ff_hex_to_data(codec->extradata, value);
- return 0;
-}
-
-static int rtp_parse_mp4_au(PayloadContext *data, const uint8_t *buf, int len)
-{
- int au_headers_length, au_header_size, i;
- GetBitContext getbitcontext;
-
- if (len < 2)
- return AVERROR_INVALIDDATA;
-
- /* decode the first 2 bytes where the AUHeader sections are stored
- length in bits */
- au_headers_length = AV_RB16(buf);
-
- if (au_headers_length > RTP_MAX_PACKET_LENGTH)
- return -1;
-
- data->au_headers_length_bytes = (au_headers_length + 7) / 8;
-
- /* skip AU headers length section (2 bytes) */
- buf += 2;
- len -= 2;
-
- if (len < data->au_headers_length_bytes)
- return AVERROR_INVALIDDATA;
-
- init_get_bits(&getbitcontext, buf, data->au_headers_length_bytes * 8);
-
- /* XXX: Wrong if optional additional sections are present (cts, dts etc...) */
- au_header_size = data->sizelength + data->indexlength;
- if (au_header_size <= 0 || (au_headers_length % au_header_size != 0))
- return -1;
-
- data->nb_au_headers = au_headers_length / au_header_size;
- if (!data->au_headers || data->au_headers_allocated < data->nb_au_headers) {
- av_free(data->au_headers);
- data->au_headers = av_malloc(sizeof(struct AUHeaders) * data->nb_au_headers);
- if (!data->au_headers)
- return AVERROR(ENOMEM);
- data->au_headers_allocated = data->nb_au_headers;
- }
-
- for (i = 0; i < data->nb_au_headers; ++i) {
- data->au_headers[i].size = get_bits_long(&getbitcontext, data->sizelength);
- data->au_headers[i].index = get_bits_long(&getbitcontext, data->indexlength);
- }
-
- return 0;
-}
-
-
-/* Follows RFC 3640 */
-static int aac_parse_packet(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len, uint16_t seq,
- int flags)
-{
- int ret;
-
- if (!buf) {
- if (data->cur_au_index > data->nb_au_headers)
- return AVERROR_INVALIDDATA;
- if (data->buf_size - data->buf_pos < data->au_headers[data->cur_au_index].size)
- return AVERROR_INVALIDDATA;
- if ((ret = av_new_packet(pkt, data->au_headers[data->cur_au_index].size)) < 0)
- return ret;
- memcpy(pkt->data, &data->buf[data->buf_pos], data->au_headers[data->cur_au_index].size);
- data->buf_pos += data->au_headers[data->cur_au_index].size;
- pkt->stream_index = st->index;
- data->cur_au_index++;
- return data->cur_au_index < data->nb_au_headers;
- }
-
- if (rtp_parse_mp4_au(data, buf, len))
- return -1;
-
- buf += data->au_headers_length_bytes + 2;
- len -= data->au_headers_length_bytes + 2;
-
- if (len < data->au_headers[0].size)
- return AVERROR_INVALIDDATA;
- if ((ret = av_new_packet(pkt, data->au_headers[0].size)) < 0)
- return ret;
- memcpy(pkt->data, buf, data->au_headers[0].size);
- len -= data->au_headers[0].size;
- buf += data->au_headers[0].size;
- pkt->stream_index = st->index;
-
- if (len > 0 && data->nb_au_headers > 1) {
- data->buf_size = FFMIN(len, sizeof(data->buf));
- memcpy(data->buf, buf, data->buf_size);
- data->cur_au_index = 1;
- data->buf_pos = 0;
- return 1;
- }
-
- return 0;
-}
-
-static int parse_fmtp(AVStream *stream, PayloadContext *data,
- char *attr, char *value)
-{
- AVCodecContext *codec = stream->codec;
- int res, i;
-
- if (!strcmp(attr, "config")) {
- res = parse_fmtp_config(codec, value);
-
- if (res < 0)
- return res;
- }
-
- if (codec->codec_id == AV_CODEC_ID_AAC) {
- /* Looking for a known attribute */
- for (i = 0; attr_names[i].str; ++i) {
- if (!av_strcasecmp(attr, attr_names[i].str)) {
- if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
- *(int *)((char *)data+
- attr_names[i].offset) = atoi(value);
- } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
- *(char **)((char *)data+
- attr_names[i].offset) = av_strdup(value);
- }
- }
- }
- return 0;
-}
-
-static int parse_sdp_line(AVFormatContext *s, int st_index,
- PayloadContext *data, const char *line)
-{
- const char *p;
-
- if (st_index < 0)
- return 0;
-
- if (av_strstart(line, "fmtp:", &p))
- return ff_parse_fmtp(s->streams[st_index], data, p, parse_fmtp);
-
- return 0;
-}
-
-static av_cold int init_video(AVFormatContext *s, int st_index,
- PayloadContext *data)
-{
- if (st_index < 0)
- return 0;
- s->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL;
- return 0;
-}
-
-RTPDynamicProtocolHandler ff_mp4v_es_dynamic_handler = {
- .enc_name = "MP4V-ES",
- .codec_type = AVMEDIA_TYPE_VIDEO,
- .codec_id = AV_CODEC_ID_MPEG4,
- .init = init_video,
- .parse_sdp_a_line = parse_sdp_line,
-};
-
-RTPDynamicProtocolHandler ff_mpeg4_generic_dynamic_handler = {
- .enc_name = "mpeg4-generic",
- .codec_type = AVMEDIA_TYPE_AUDIO,
- .codec_id = AV_CODEC_ID_AAC,
- .parse_sdp_a_line = parse_sdp_line,
- .alloc = new_context,
- .free = free_context,
- .parse_packet = aac_parse_packet
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 13:17:47 +0000