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-rw-r--r--libmpdemux/demux_rtp_codec.cpp203
1 files changed, 203 insertions, 0 deletions
diff --git a/libmpdemux/demux_rtp_codec.cpp b/libmpdemux/demux_rtp_codec.cpp
new file mode 100644
index 0000000000..28e7f2e184
--- /dev/null
+++ b/libmpdemux/demux_rtp_codec.cpp
@@ -0,0 +1,203 @@
+////////// Codec-specific routines used to interface between "MPlayer"
+////////// and the "LIVE.COM Streaming Media" libraries:
+
+#include "demux_rtp_internal.h"
+extern "C" {
+#include "stheader.h"
+}
+
+static Boolean
+parseQTState_video(QuickTimeGenericRTPSource::QTState const& qtState,
+ unsigned& fourcc); // forward
+static Boolean
+parseQTState_audio(QuickTimeGenericRTPSource::QTState const& qtState,
+ unsigned& fourcc, unsigned& numChannels); // forward
+
+void rtpCodecInitialize_video(demuxer_t* demuxer,
+ MediaSubsession* subsession,
+ unsigned& flags) {
+ flags = 0;
+ // Create a dummy video stream header
+ // to make the main MPlayer code happy:
+ sh_video_t* sh_video = new_sh_video(demuxer,0);
+ BITMAPINFOHEADER* bih
+ = (BITMAPINFOHEADER*)calloc(1,sizeof(BITMAPINFOHEADER));
+ bih->biSize = sizeof(BITMAPINFOHEADER);
+ sh_video->bih = bih;
+ demux_stream_t* d_video = demuxer->video;
+ d_video->sh = sh_video; sh_video->ds = d_video;
+
+ // If we happen to know the subsession's video frame rate, set it,
+ // so that the user doesn't have to give the "-fps" option instead.
+ int fps = (int)(subsession->videoFPS());
+ if (fps != 0) sh_video->fps = fps;
+
+ // Map known video MIME types to the BITMAPINFOHEADER parameters
+ // that this program uses. (Note that not all types need all
+ // of the parameters to be set.)
+ if (strcmp(subsession->codecName(), "MPV") == 0 ||
+ strcmp(subsession->codecName(), "MP1S") == 0 ||
+ strcmp(subsession->codecName(), "MP2T") == 0) {
+ flags |= RTPSTATE_IS_MPEG;
+ } else if (strcmp(subsession->codecName(), "H263") == 0 ||
+ strcmp(subsession->codecName(), "H263-1998") == 0) {
+ bih->biCompression = sh_video->format
+ = mmioFOURCC('H','2','6','3');
+ } else if (strcmp(subsession->codecName(), "H261") == 0) {
+ bih->biCompression = sh_video->format
+ = mmioFOURCC('H','2','6','1');
+ } else if (strcmp(subsession->codecName(), "X-QT") == 0 ||
+ strcmp(subsession->codecName(), "X-QUICKTIME") == 0) {
+ // QuickTime generic RTP format, as described in
+ // http://developer.apple.com/quicktime/icefloe/dispatch026.html
+
+ // We can't initialize this stream until we've received the first packet
+ // that has QuickTime "sdAtom" information in the header. So, keep
+ // reading packets until we get one:
+ unsigned char* packetData; unsigned packetDataLen;
+ QuickTimeGenericRTPSource* qtRTPSource
+ = (QuickTimeGenericRTPSource*)(subsession->rtpSource());
+ unsigned fourcc;
+ do {
+ if (!awaitRTPPacket(demuxer, 0 /*video*/, packetData, packetDataLen)) {
+ return;
+ }
+ } while (!parseQTState_video(qtRTPSource->qtState, fourcc));
+
+ bih->biCompression = sh_video->format = fourcc;
+ } else {
+ fprintf(stderr,
+ "Unknown MPlayer format code for MIME type \"video/%s\"\n",
+ subsession->codecName());
+ }
+}
+
+void rtpCodecInitialize_audio(demuxer_t* demuxer,
+ MediaSubsession* subsession,
+ unsigned& flags) {
+ flags = 0;
+ // Create a dummy audio stream header
+ // to make the main MPlayer code happy:
+ sh_audio_t* sh_audio = new_sh_audio(demuxer,0);
+ WAVEFORMATEX* wf = (WAVEFORMATEX*)calloc(1,sizeof(WAVEFORMATEX));
+ sh_audio->wf = wf;
+ demux_stream_t* d_audio = demuxer->audio;
+ d_audio->sh = sh_audio; sh_audio->ds = d_audio;
+
+ // Map known audio MIME types to the WAVEFORMATEX parameters
+ // that this program uses. (Note that not all types need all
+ // of the parameters to be set.)
+ wf->nSamplesPerSec
+ = subsession->rtpSource()->timestampFrequency(); // by default
+ if (strcmp(subsession->codecName(), "MPA") == 0 ||
+ strcmp(subsession->codecName(), "MPA-ROBUST") == 0 ||
+ strcmp(subsession->codecName(), "X-MP3-DRAFT-00") == 0) {
+ wf->wFormatTag = sh_audio->format = 0x55;
+ // Note: 0x55 is for layer III, but should work for I,II also
+ wf->nSamplesPerSec = 0; // sample rate is deduced from the data
+ flags |= RTPSTATE_IS_MPEG;
+ } else if (strcmp(subsession->codecName(), "AC3") == 0) {
+ wf->wFormatTag = sh_audio->format = 0x2000;
+ wf->nSamplesPerSec = 0; // sample rate is deduced from the data
+ } else if (strcmp(subsession->codecName(), "PCMU") == 0) {
+ wf->wFormatTag = sh_audio->format = 0x7;
+ wf->nChannels = 1;
+ wf->nAvgBytesPerSec = 8000;
+ wf->nBlockAlign = 1;
+ wf->wBitsPerSample = 8;
+ wf->cbSize = 0;
+ } else if (strcmp(subsession->codecName(), "PCMA") == 0) {
+ wf->wFormatTag = sh_audio->format = 0x6;
+ wf->nChannels = 1;
+ wf->nAvgBytesPerSec = 8000;
+ wf->nBlockAlign = 1;
+ wf->wBitsPerSample = 8;
+ wf->cbSize = 0;
+ } else if (strcmp(subsession->codecName(), "GSM") == 0) {
+ wf->wFormatTag = sh_audio->format = mmioFOURCC('a','g','s','m');
+ wf->nChannels = 1;
+ wf->nAvgBytesPerSec = 1650;
+ wf->nBlockAlign = 33;
+ wf->wBitsPerSample = 16;
+ wf->cbSize = 0;
+ } else if (strcmp(subsession->codecName(), "QCELP") == 0) {
+ wf->wFormatTag = sh_audio->format = mmioFOURCC('Q','c','l','p');
+ // The following settings for QCELP don't quite work right #####
+ wf->nChannels = 1;
+ wf->nAvgBytesPerSec = 1750;
+ wf->nBlockAlign = 35;
+ wf->wBitsPerSample = 16;
+ wf->cbSize = 0;
+ } else if (strcmp(subsession->codecName(), "MP4A-LATM") == 0) {
+ wf->wFormatTag = sh_audio->format = mmioFOURCC('m','p','4','a');
+#ifndef HAVE_FAAD
+ fprintf(stderr, "WARNING: Playing MPEG-4 (AAC) Audio requires the \"faad\" library!\n");
+#endif
+#if (LIVEMEDIA_LIBRARY_VERSION_INT < 1042761600)
+ fprintf(stderr, "WARNING: This audio stream might not play correctly. Please upgrade to version \"2003.01.17\" or later of the \"LIVE.COM Streaming Media\" libraries.\n");
+#else
+ // For the codec to work correctly, it needs "AudioSpecificConfig"
+ // data, which is parsed from the "StreamMuxConfig" string that
+ // was present (hopefully) in the SDP description:
+ unsigned codecdata_len;
+ sh_audio->codecdata
+ = parseStreamMuxConfigStr(subsession->fmtp_config(),
+ codecdata_len);
+ sh_audio->codecdata_len = codecdata_len;
+#endif
+ flags |= RTPSTATE_IS_MPEG;
+ } else if (strcmp(subsession->codecName(), "X-QT") == 0 ||
+ strcmp(subsession->codecName(), "X-QUICKTIME") == 0) {
+ // QuickTime generic RTP format, as described in
+ // http://developer.apple.com/quicktime/icefloe/dispatch026.html
+
+ // We can't initialize this stream until we've received the first packet
+ // that has QuickTime "sdAtom" information in the header. So, keep
+ // reading packets until we get one:
+ unsigned char* packetData; unsigned packetDataLen;
+ QuickTimeGenericRTPSource* qtRTPSource
+ = (QuickTimeGenericRTPSource*)(subsession->rtpSource());
+ unsigned fourcc, numChannels;
+ do {
+ if (!awaitRTPPacket(demuxer, 1 /*audio*/, packetData, packetDataLen)) {
+ return;
+ }
+ } while (!parseQTState_audio(qtRTPSource->qtState, fourcc, numChannels));
+
+ wf->wFormatTag = sh_audio->format = fourcc;
+ wf->nChannels = numChannels;
+ } else {
+ fprintf(stderr,
+ "Unknown MPlayer format code for MIME type \"audio/%s\"\n",
+ subsession->codecName());
+ }
+}
+
+static Boolean
+parseQTState_video(QuickTimeGenericRTPSource::QTState const& qtState,
+ unsigned& fourcc) {
+ // qtState's "sdAtom" field is supposed to contain a QuickTime video
+ // 'sample description' atom. This atom's name is the 'fourcc' that we want:
+ char const* sdAtom = qtState.sdAtom;
+ if (sdAtom == NULL || qtState.sdAtomSize < 2*4) return False;
+
+ fourcc = *(unsigned*)(&sdAtom[4]); // put in host order
+ return True;
+}
+
+static Boolean
+parseQTState_audio(QuickTimeGenericRTPSource::QTState const& qtState,
+ unsigned& fourcc, unsigned& numChannels) {
+ // qtState's "sdAtom" field is supposed to contain a QuickTime audio
+ // 'sample description' atom. This atom's name is the 'fourcc' that we want.
+ // Also, the top half of the 5th word following the atom name should
+ // contain the number of channels ("numChannels") that we want:
+ char const* sdAtom = qtState.sdAtom;
+ if (sdAtom == NULL || qtState.sdAtomSize < 7*4) return False;
+
+ fourcc = *(unsigned*)(&sdAtom[4]); // put in host order
+
+ char const* word7Ptr = &sdAtom[6*4];
+ numChannels = (word7Ptr[0]<<8)|(word7Ptr[1]);
+ return True;
+}
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