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Diffstat (limited to 'ffmpeg1/libavformat/rtpdec_h264.c')
-rw-r--r--ffmpeg1/libavformat/rtpdec_h264.c399
1 files changed, 0 insertions, 399 deletions
diff --git a/ffmpeg1/libavformat/rtpdec_h264.c b/ffmpeg1/libavformat/rtpdec_h264.c
deleted file mode 100644
index d1133b7..0000000
--- a/ffmpeg1/libavformat/rtpdec_h264.c
+++ /dev/null
@@ -1,399 +0,0 @@
-/*
- * RTP H264 Protocol (RFC3984)
- * Copyright (c) 2006 Ryan Martell
- *
- * 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 H.264 / RTP Code (RFC3984)
- * @author Ryan Martell <rdm4@martellventures.com>
- *
- * @note Notes:
- * Notes:
- * This currently supports packetization mode:
- * Single Nal Unit Mode (0), or
- * Non-Interleaved Mode (1). It currently does not support
- * Interleaved Mode (2). (This requires implementing STAP-B, MTAP16, MTAP24,
- * FU-B packet types)
- */
-
-#include "libavutil/base64.h"
-#include "libavutil/avstring.h"
-#include "libavcodec/get_bits.h"
-#include "avformat.h"
-
-#include "network.h"
-#include <assert.h>
-
-#include "rtpdec.h"
-#include "rtpdec_formats.h"
-
-struct PayloadContext {
- // sdp setup parameters
- uint8_t profile_idc;
- uint8_t profile_iop;
- uint8_t level_idc;
- int packetization_mode;
-#ifdef DEBUG
- int packet_types_received[32];
-#endif
-};
-
-#ifdef DEBUG
-#define COUNT_NAL_TYPE(data, nal) data->packet_types_received[(nal) & 0x1f]++
-#else
-#define COUNT_NAL_TYPE(data, nal) do { } while (0)
-#endif
-
-static const uint8_t start_sequence[] = { 0, 0, 0, 1 };
-
-static int sdp_parse_fmtp_config_h264(AVStream *stream,
- PayloadContext *h264_data,
- char *attr, char *value)
-{
- AVCodecContext *codec = stream->codec;
- assert(codec->codec_id == AV_CODEC_ID_H264);
- assert(h264_data != NULL);
-
- if (!strcmp(attr, "packetization-mode")) {
- av_log(codec, AV_LOG_DEBUG, "RTP Packetization Mode: %d\n", atoi(value));
- h264_data->packetization_mode = atoi(value);
- /*
- * Packetization Mode:
- * 0 or not present: Single NAL mode (Only nals from 1-23 are allowed)
- * 1: Non-interleaved Mode: 1-23, 24 (STAP-A), 28 (FU-A) are allowed.
- * 2: Interleaved Mode: 25 (STAP-B), 26 (MTAP16), 27 (MTAP24), 28 (FU-A),
- * and 29 (FU-B) are allowed.
- */
- if (h264_data->packetization_mode > 1)
- av_log(codec, AV_LOG_ERROR,
- "Interleaved RTP mode is not supported yet.\n");
- } else if (!strcmp(attr, "profile-level-id")) {
- if (strlen(value) == 6) {
- char buffer[3];
- // 6 characters=3 bytes, in hex.
- uint8_t profile_idc;
- uint8_t profile_iop;
- uint8_t level_idc;
-
- buffer[0] = value[0];
- buffer[1] = value[1];
- buffer[2] = '\0';
- profile_idc = strtol(buffer, NULL, 16);
- buffer[0] = value[2];
- buffer[1] = value[3];
- profile_iop = strtol(buffer, NULL, 16);
- buffer[0] = value[4];
- buffer[1] = value[5];
- level_idc = strtol(buffer, NULL, 16);
-
- av_log(codec, AV_LOG_DEBUG,
- "RTP Profile IDC: %x Profile IOP: %x Level: %x\n",
- profile_idc, profile_iop, level_idc);
- h264_data->profile_idc = profile_idc;
- h264_data->profile_iop = profile_iop;
- h264_data->level_idc = level_idc;
- }
- } else if (!strcmp(attr, "sprop-parameter-sets")) {
- codec->extradata_size = 0;
- av_freep(&codec->extradata);
-
- while (*value) {
- char base64packet[1024];
- uint8_t decoded_packet[1024];
- int packet_size;
- char *dst = base64packet;
-
- while (*value && *value != ','
- && (dst - base64packet) < sizeof(base64packet) - 1) {
- *dst++ = *value++;
- }
- *dst++ = '\0';
-
- if (*value == ',')
- value++;
-
- packet_size = av_base64_decode(decoded_packet, base64packet,
- sizeof(decoded_packet));
- if (packet_size > 0) {
- uint8_t *dest = av_malloc(packet_size + sizeof(start_sequence) +
- codec->extradata_size +
- FF_INPUT_BUFFER_PADDING_SIZE);
- if (!dest) {
- av_log(codec, AV_LOG_ERROR,
- "Unable to allocate memory for extradata!\n");
- return AVERROR(ENOMEM);
- }
- if (codec->extradata_size) {
- memcpy(dest, codec->extradata, codec->extradata_size);
- av_free(codec->extradata);
- }
-
- memcpy(dest + codec->extradata_size, start_sequence,
- sizeof(start_sequence));
- memcpy(dest + codec->extradata_size + sizeof(start_sequence),
- decoded_packet, packet_size);
- memset(dest + codec->extradata_size + sizeof(start_sequence) +
- packet_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-
- codec->extradata = dest;
- codec->extradata_size += sizeof(start_sequence) + packet_size;
- }
- }
- av_log(codec, AV_LOG_DEBUG, "Extradata set to %p (size: %d)!\n",
- codec->extradata, codec->extradata_size);
- }
- return 0;
-}
-
-// return 0 on packet, no more left, 1 on packet, 1 on partial packet
-static int h264_handle_packet(AVFormatContext *ctx, PayloadContext *data,
- AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len, uint16_t seq,
- int flags)
-{
- uint8_t nal;
- uint8_t type;
- int result = 0;
-
- if (!len) {
- av_log(ctx, AV_LOG_ERROR, "Empty H264 RTP packet\n");
- return AVERROR_INVALIDDATA;
- }
- nal = buf[0];
- type = nal & 0x1f;
-
- assert(data);
- assert(buf);
-
- /* Simplify the case (these are all the nal types used internally by
- * the h264 codec). */
- if (type >= 1 && type <= 23)
- type = 1;
- switch (type) {
- case 0: // undefined, but pass them through
- case 1:
- av_new_packet(pkt, len + sizeof(start_sequence));
- memcpy(pkt->data, start_sequence, sizeof(start_sequence));
- memcpy(pkt->data + sizeof(start_sequence), buf, len);
- COUNT_NAL_TYPE(data, nal);
- break;
-
- case 24: // STAP-A (one packet, multiple nals)
- // consume the STAP-A NAL
- buf++;
- len--;
- // first we are going to figure out the total size
- {
- int pass = 0;
- int total_length = 0;
- uint8_t *dst = NULL;
-
- for (pass = 0; pass < 2; pass++) {
- const uint8_t *src = buf;
- int src_len = len;
-
- while (src_len > 2) {
- uint16_t nal_size = AV_RB16(src);
-
- // consume the length of the aggregate
- src += 2;
- src_len -= 2;
-
- if (nal_size <= src_len) {
- if (pass == 0) {
- // counting
- total_length += sizeof(start_sequence) + nal_size;
- } else {
- // copying
- assert(dst);
- memcpy(dst, start_sequence, sizeof(start_sequence));
- dst += sizeof(start_sequence);
- memcpy(dst, src, nal_size);
- COUNT_NAL_TYPE(data, *src);
- dst += nal_size;
- }
- } else {
- av_log(ctx, AV_LOG_ERROR,
- "nal size exceeds length: %d %d\n", nal_size, src_len);
- }
-
- // eat what we handled
- src += nal_size;
- src_len -= nal_size;
-
- if (src_len < 0)
- av_log(ctx, AV_LOG_ERROR,
- "Consumed more bytes than we got! (%d)\n", src_len);
- }
-
- if (pass == 0) {
- /* now we know the total size of the packet (with the
- * start sequences added) */
- av_new_packet(pkt, total_length);
- dst = pkt->data;
- } else {
- assert(dst - pkt->data == total_length);
- }
- }
- }
- break;
-
- case 25: // STAP-B
- case 26: // MTAP-16
- case 27: // MTAP-24
- case 29: // FU-B
- av_log(ctx, AV_LOG_ERROR,
- "Unhandled type (%d) (See RFC for implementation details\n",
- type);
- result = AVERROR(ENOSYS);
- break;
-
- case 28: // FU-A (fragmented nal)
- buf++;
- len--; // skip the fu_indicator
- if (len > 1) {
- // these are the same as above, we just redo them here for clarity
- uint8_t fu_indicator = nal;
- uint8_t fu_header = *buf;
- uint8_t start_bit = fu_header >> 7;
- uint8_t av_unused end_bit = (fu_header & 0x40) >> 6;
- uint8_t nal_type = fu_header & 0x1f;
- uint8_t reconstructed_nal;
-
- // Reconstruct this packet's true nal; only the data follows.
- /* The original nal forbidden bit and NRI are stored in this
- * packet's nal. */
- reconstructed_nal = fu_indicator & 0xe0;
- reconstructed_nal |= nal_type;
-
- // skip the fu_header
- buf++;
- len--;
-
- if (start_bit)
- COUNT_NAL_TYPE(data, nal_type);
- if (start_bit) {
- /* copy in the start sequence, and the reconstructed nal */
- av_new_packet(pkt, sizeof(start_sequence) + sizeof(nal) + len);
- memcpy(pkt->data, start_sequence, sizeof(start_sequence));
- pkt->data[sizeof(start_sequence)] = reconstructed_nal;
- memcpy(pkt->data + sizeof(start_sequence) + sizeof(nal), buf, len);
- } else {
- av_new_packet(pkt, len);
- memcpy(pkt->data, buf, len);
- }
- } else {
- av_log(ctx, AV_LOG_ERROR, "Too short data for FU-A H264 RTP packet\n");
- result = AVERROR_INVALIDDATA;
- }
- break;
-
- case 30: // undefined
- case 31: // undefined
- default:
- av_log(ctx, AV_LOG_ERROR, "Undefined type (%d)\n", type);
- result = AVERROR_INVALIDDATA;
- break;
- }
-
- pkt->stream_index = st->index;
-
- return result;
-}
-
-static PayloadContext *h264_new_context(void)
-{
- return av_mallocz(sizeof(PayloadContext) + FF_INPUT_BUFFER_PADDING_SIZE);
-}
-
-static void h264_free_context(PayloadContext *data)
-{
-#ifdef DEBUG
- int ii;
-
- for (ii = 0; ii < 32; ii++) {
- if (data->packet_types_received[ii])
- av_log(NULL, AV_LOG_DEBUG, "Received %d packets of type %d\n",
- data->packet_types_received[ii], ii);
- }
-#endif
-
- av_free(data);
-}
-
-static int h264_init(AVFormatContext *s, int st_index, PayloadContext *data)
-{
- if (st_index < 0)
- return 0;
- s->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL;
- return 0;
-}
-
-static int parse_h264_sdp_line(AVFormatContext *s, int st_index,
- PayloadContext *h264_data, const char *line)
-{
- AVStream *stream;
- AVCodecContext *codec;
- const char *p = line;
-
- if (st_index < 0)
- return 0;
-
- stream = s->streams[st_index];
- codec = stream->codec;
-
- if (av_strstart(p, "framesize:", &p)) {
- char buf1[50];
- char *dst = buf1;
-
- // remove the protocol identifier
- while (*p && *p == ' ')
- p++; // strip spaces.
- while (*p && *p != ' ')
- p++; // eat protocol identifier
- while (*p && *p == ' ')
- p++; // strip trailing spaces.
- while (*p && *p != '-' && (dst - buf1) < sizeof(buf1) - 1)
- *dst++ = *p++;
- *dst = '\0';
-
- // a='framesize:96 320-240'
- // set our parameters
- codec->width = atoi(buf1);
- codec->height = atoi(p + 1); // skip the -
- } else if (av_strstart(p, "fmtp:", &p)) {
- return ff_parse_fmtp(stream, h264_data, p, sdp_parse_fmtp_config_h264);
- } else if (av_strstart(p, "cliprect:", &p)) {
- // could use this if we wanted.
- }
-
- return 0;
-}
-
-RTPDynamicProtocolHandler ff_h264_dynamic_handler = {
- .enc_name = "H264",
- .codec_type = AVMEDIA_TYPE_VIDEO,
- .codec_id = AV_CODEC_ID_H264,
- .init = h264_init,
- .parse_sdp_a_line = parse_h264_sdp_line,
- .alloc = h264_new_context,
- .free = h264_free_context,
- .parse_packet = h264_handle_packet
-};
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