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Diffstat (limited to 'ffmpeg/libavformat/rtpdec_qcelp.c')
-rw-r--r--ffmpeg/libavformat/rtpdec_qcelp.c230
1 files changed, 0 insertions, 230 deletions
diff --git a/ffmpeg/libavformat/rtpdec_qcelp.c b/ffmpeg/libavformat/rtpdec_qcelp.c
deleted file mode 100644
index eebcdd0..0000000
--- a/ffmpeg/libavformat/rtpdec_qcelp.c
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- * RTP Depacketization of QCELP/PureVoice, RFC 2658
- * 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 "rtpdec_formats.h"
-
-static const uint8_t frame_sizes[] = {
- 1, 4, 8, 17, 35
-};
-
-typedef struct {
- int pos;
- int size;
- /* The largest frame is 35 bytes, only 10 frames are allowed per
- * packet, and we return the first one immediately, so allocate
- * space for 9 frames */
- uint8_t data[35*9];
-} InterleavePacket;
-
-struct PayloadContext {
- int interleave_size;
- int interleave_index;
- InterleavePacket group[6];
- int group_finished;
-
- /* The maximum packet size, 10 frames of 35 bytes each, and one
- * packet header byte. */
- uint8_t next_data[1 + 35*10];
- int next_size;
- uint32_t next_timestamp;
-};
-
-static PayloadContext *qcelp_new_context(void)
-{
- return av_mallocz(sizeof(PayloadContext));
-}
-
-static void qcelp_free_context(PayloadContext *data)
-{
- av_free(data);
-}
-
-static int return_stored_frame(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len);
-
-static int store_packet(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len)
-{
- int interleave_size, interleave_index;
- int frame_size, ret;
- InterleavePacket* ip;
-
- if (len < 2)
- return AVERROR_INVALIDDATA;
-
- interleave_size = buf[0] >> 3 & 7;
- interleave_index = buf[0] & 7;
-
- if (interleave_size > 5) {
- av_log(ctx, AV_LOG_ERROR, "Invalid interleave size %d\n",
- interleave_size);
- return AVERROR_INVALIDDATA;
- }
- if (interleave_index > interleave_size) {
- av_log(ctx, AV_LOG_ERROR, "Invalid interleave index %d/%d\n",
- interleave_index, interleave_size);
- return AVERROR_INVALIDDATA;
- }
- if (interleave_size != data->interleave_size) {
- int i;
- /* First packet, or changed interleave size */
- data->interleave_size = interleave_size;
- data->interleave_index = 0;
- for (i = 0; i < 6; i++)
- data->group[i].size = 0;
- }
-
- if (interleave_index < data->interleave_index) {
- /* Wrapped around - missed the last packet of the previous group. */
- if (data->group_finished) {
- /* No more data in the packets in this interleaving group, just
- * start processing the next one */
- data->interleave_index = 0;
- } else {
- /* Stash away the current packet, emit everything we have of the
- * previous group. */
- for (; data->interleave_index <= interleave_size;
- data->interleave_index++)
- data->group[data->interleave_index].size = 0;
-
- if (len > sizeof(data->next_data))
- return AVERROR_INVALIDDATA;
- memcpy(data->next_data, buf, len);
- data->next_size = len;
- data->next_timestamp = *timestamp;
- *timestamp = RTP_NOTS_VALUE;
-
- data->interleave_index = 0;
- return return_stored_frame(ctx, data, st, pkt, timestamp, buf, len);
- }
- }
- if (interleave_index > data->interleave_index) {
- /* We missed a packet */
- for (; data->interleave_index < interleave_index;
- data->interleave_index++)
- data->group[data->interleave_index].size = 0;
- }
- data->interleave_index = interleave_index;
-
- if (buf[1] >= FF_ARRAY_ELEMS(frame_sizes))
- return AVERROR_INVALIDDATA;
- frame_size = frame_sizes[buf[1]];
- if (1 + frame_size > len)
- return AVERROR_INVALIDDATA;
-
- if (len - 1 - frame_size > sizeof(data->group[0].data))
- return AVERROR_INVALIDDATA;
-
- if ((ret = av_new_packet(pkt, frame_size)) < 0)
- return ret;
- memcpy(pkt->data, &buf[1], frame_size);
- pkt->stream_index = st->index;
-
- ip = &data->group[data->interleave_index];
- ip->size = len - 1 - frame_size;
- ip->pos = 0;
- memcpy(ip->data, &buf[1 + frame_size], ip->size);
- /* Each packet must contain the same number of frames according to the
- * RFC. If there's no data left in this packet, there shouldn't be any
- * in any of the other frames in the interleaving group either. */
- data->group_finished = ip->size == 0;
-
- if (interleave_index == interleave_size) {
- data->interleave_index = 0;
- return !data->group_finished;
- } else {
- data->interleave_index++;
- return 0;
- }
-}
-
-static int return_stored_frame(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len)
-{
- InterleavePacket* ip = &data->group[data->interleave_index];
- int frame_size, ret;
-
- if (data->group_finished && data->interleave_index == 0) {
- *timestamp = data->next_timestamp;
- ret = store_packet(ctx, data, st, pkt, timestamp, data->next_data,
- data->next_size);
- data->next_size = 0;
- return ret;
- }
-
- if (ip->size == 0) {
- /* No stored data for this interleave block, output an empty packet */
- if ((ret = av_new_packet(pkt, 1)) < 0)
- return ret;
- pkt->data[0] = 0; // Blank - could also be 14, Erasure
- } else {
- if (ip->pos >= ip->size)
- return AVERROR_INVALIDDATA;
- if (ip->data[ip->pos] >= FF_ARRAY_ELEMS(frame_sizes))
- return AVERROR_INVALIDDATA;
- frame_size = frame_sizes[ip->data[ip->pos]];
- if (ip->pos + frame_size > ip->size)
- return AVERROR_INVALIDDATA;
-
- if ((ret = av_new_packet(pkt, frame_size)) < 0)
- return ret;
- memcpy(pkt->data, &ip->data[ip->pos], frame_size);
-
- ip->pos += frame_size;
- data->group_finished = ip->pos >= ip->size;
- }
- pkt->stream_index = st->index;
-
- if (data->interleave_index == data->interleave_size) {
- data->interleave_index = 0;
- if (!data->group_finished)
- return 1;
- else
- return data->next_size > 0;
- } else {
- data->interleave_index++;
- return 1;
- }
-}
-
-static int qcelp_parse_packet(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len, uint16_t seq,
- int flags)
-{
- if (buf)
- return store_packet(ctx, data, st, pkt, timestamp, buf, len);
- else
- return return_stored_frame(ctx, data, st, pkt, timestamp, buf, len);
-}
-
-RTPDynamicProtocolHandler ff_qcelp_dynamic_handler = {
- .enc_name = "x-Purevoice",
- .codec_type = AVMEDIA_TYPE_AUDIO,
- .codec_id = AV_CODEC_ID_QCELP,
- .static_payload_id = 12,
- .alloc = qcelp_new_context,
- .free = qcelp_free_context,
- .parse_packet = qcelp_parse_packet
-};
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