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Diffstat (limited to 'ffmpeg/libavformat/rtpdec_amr.c')
-rw-r--r--ffmpeg/libavformat/rtpdec_amr.c209
1 files changed, 0 insertions, 209 deletions
diff --git a/ffmpeg/libavformat/rtpdec_amr.c b/ffmpeg/libavformat/rtpdec_amr.c
deleted file mode 100644
index 211cf17..0000000
--- a/ffmpeg/libavformat/rtpdec_amr.c
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
- * RTP AMR Depacketizer, RFC 3267
- * Copyright (c) 2010 Martin Storsjo
- *
- * 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 "libavutil/channel_layout.h"
-#include "avformat.h"
-#include "rtpdec_formats.h"
-#include "libavutil/avstring.h"
-
-static const uint8_t frame_sizes_nb[16] = {
- 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0
-};
-static const uint8_t frame_sizes_wb[16] = {
- 17, 23, 32, 36, 40, 46, 50, 58, 60, 5, 5, 0, 0, 0, 0, 0
-};
-
-struct PayloadContext {
- int octet_align;
- int crc;
- int interleaving;
- int channels;
-};
-
-static PayloadContext *amr_new_context(void)
-{
- PayloadContext *data = av_mallocz(sizeof(PayloadContext));
- if(!data) return data;
- data->channels = 1;
- return data;
-}
-
-static void amr_free_context(PayloadContext *data)
-{
- av_free(data);
-}
-
-static int amr_handle_packet(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len, uint16_t seq,
- int flags)
-{
- const uint8_t *frame_sizes = NULL;
- int frames;
- int i;
- const uint8_t *speech_data;
- uint8_t *ptr;
-
- if (st->codec->codec_id == AV_CODEC_ID_AMR_NB) {
- frame_sizes = frame_sizes_nb;
- } else if (st->codec->codec_id == AV_CODEC_ID_AMR_WB) {
- frame_sizes = frame_sizes_wb;
- } else {
- av_log(ctx, AV_LOG_ERROR, "Bad codec ID\n");
- return AVERROR_INVALIDDATA;
- }
-
- if (st->codec->channels != 1) {
- av_log(ctx, AV_LOG_ERROR, "Only mono AMR is supported\n");
- return AVERROR_INVALIDDATA;
- }
- st->codec->channel_layout = AV_CH_LAYOUT_MONO;
-
- /* The AMR RTP packet consists of one header byte, followed
- * by one TOC byte for each AMR frame in the packet, followed
- * by the speech data for all the AMR frames.
- *
- * The header byte contains only a codec mode request, for
- * requesting what kind of AMR data the sender wants to
- * receive. Not used at the moment.
- */
-
- /* Count the number of frames in the packet. The highest bit
- * is set in a TOC byte if there are more frames following.
- */
- for (frames = 1; frames < len && (buf[frames] & 0x80); frames++) ;
-
- if (1 + frames >= len) {
- /* We hit the end of the packet while counting frames. */
- av_log(ctx, AV_LOG_ERROR, "No speech data found\n");
- return AVERROR_INVALIDDATA;
- }
-
- speech_data = buf + 1 + frames;
-
- /* Everything except the codec mode request byte should be output. */
- if (av_new_packet(pkt, len - 1)) {
- av_log(ctx, AV_LOG_ERROR, "Out of memory\n");
- return AVERROR(ENOMEM);
- }
- pkt->stream_index = st->index;
- ptr = pkt->data;
-
- for (i = 0; i < frames; i++) {
- uint8_t toc = buf[1 + i];
- int frame_size = frame_sizes[(toc >> 3) & 0x0f];
-
- if (speech_data + frame_size > buf + len) {
- /* Too little speech data */
- av_log(ctx, AV_LOG_WARNING, "Too little speech data in the RTP packet\n");
- /* Set the unwritten part of the packet to zero. */
- memset(ptr, 0, pkt->data + pkt->size - ptr);
- pkt->size = ptr - pkt->data;
- return 0;
- }
-
- /* Extract the AMR frame mode from the TOC byte */
- *ptr++ = toc & 0x7C;
-
- /* Copy the speech data */
- memcpy(ptr, speech_data, frame_size);
- speech_data += frame_size;
- ptr += frame_size;
- }
-
- if (speech_data < buf + len) {
- av_log(ctx, AV_LOG_WARNING, "Too much speech data in the RTP packet?\n");
- /* Set the unwritten part of the packet to zero. */
- memset(ptr, 0, pkt->data + pkt->size - ptr);
- pkt->size = ptr - pkt->data;
- }
-
- return 0;
-}
-
-static int amr_parse_fmtp(AVStream *stream, PayloadContext *data,
- char *attr, char *value)
-{
- /* Some AMR SDP configurations contain "octet-align", without
- * the trailing =1. Therefore, if the value is empty,
- * interpret it as "1".
- */
- if (!strcmp(value, "")) {
- av_log(NULL, AV_LOG_WARNING, "AMR fmtp attribute %s had "
- "nonstandard empty value\n", attr);
- strcpy(value, "1");
- }
- if (!strcmp(attr, "octet-align"))
- data->octet_align = atoi(value);
- else if (!strcmp(attr, "crc"))
- data->crc = atoi(value);
- else if (!strcmp(attr, "interleaving"))
- data->interleaving = atoi(value);
- else if (!strcmp(attr, "channels"))
- data->channels = atoi(value);
- return 0;
-}
-
-static int amr_parse_sdp_line(AVFormatContext *s, int st_index,
- PayloadContext *data, const char *line)
-{
- const char *p;
- int ret;
-
- if (st_index < 0)
- return 0;
-
- /* Parse an fmtp line this one:
- * a=fmtp:97 octet-align=1; interleaving=0
- * That is, a normal fmtp: line followed by semicolon & space
- * separated key/value pairs.
- */
- if (av_strstart(line, "fmtp:", &p)) {
- ret = ff_parse_fmtp(s->streams[st_index], data, p, amr_parse_fmtp);
- if (!data->octet_align || data->crc ||
- data->interleaving || data->channels != 1) {
- av_log(s, AV_LOG_ERROR, "Unsupported RTP/AMR configuration!\n");
- return -1;
- }
- return ret;
- }
- return 0;
-}
-
-RTPDynamicProtocolHandler ff_amr_nb_dynamic_handler = {
- .enc_name = "AMR",
- .codec_type = AVMEDIA_TYPE_AUDIO,
- .codec_id = AV_CODEC_ID_AMR_NB,
- .parse_sdp_a_line = amr_parse_sdp_line,
- .alloc = amr_new_context,
- .free = amr_free_context,
- .parse_packet = amr_handle_packet,
-};
-
-RTPDynamicProtocolHandler ff_amr_wb_dynamic_handler = {
- .enc_name = "AMR-WB",
- .codec_type = AVMEDIA_TYPE_AUDIO,
- .codec_id = AV_CODEC_ID_AMR_WB,
- .parse_sdp_a_line = amr_parse_sdp_line,
- .alloc = amr_new_context,
- .free = amr_free_context,
- .parse_packet = amr_handle_packet,
-};
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