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ff_private.c
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/*****************************************************************************
*
* Avi Import Component Private Functions
*
* Copyright(C) 2006 Christoph Naegeli <[email protected]>
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
****************************************************************************/
#include <libavcodec/avcodec.h>
#include <libavcodec/bytestream.h>
#include <CoreServices/CoreServices.h>
#include <AudioToolbox/AudioToolbox.h>
#include <QuickTime/QuickTime.h>
#include "ff_private.h"
#include "Codecprintf.h"
#include "CommonUtils.h"
#include "CodecIDs.h"
#include "FFmpegUtils.h"
#include "bitstream_info.h"
#include "MatroskaCodecIDs.h"
#undef malloc
#undef free
/* This function prepares the target Track to receivve the movie data,
* it is called if QT has asked an import operation which should just
* load this track. After success, *outmap points to a valid stream maping
* Return values:
* 0: ok
* < 0: couldn't find a matching track
*/
int prepare_track(ff_global_ptr storage, Track targetTrack, Handle dataRef, OSType dataRefType)
{
int j;
AVStream *st = NULL;
AVStream *outstr = NULL;
Media media;
NCStream *map = NULL;
AVFormatContext *ic = storage->format_context;
/* If the track has already a media, return an err */
media = GetTrackMedia(targetTrack);
if(media) goto err;
/* Search the AVFormatContext for a video stream */
for(j = 0; j < ic->nb_streams && !outstr; j++) {
st = ic->streams[j];
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
outstr = st;
}
/* Search the AVFormatContext for an audio stream (no video stream exists) */
for(j = 0; j < ic->nb_streams && !outstr; j++) {
st = ic->streams[j];
if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
outstr = st;
}
/* Still no stream, then err */
if(!outstr) goto err;
/* prepare the stream map & initialize*/
map = av_mallocz(sizeof(NCStream));
map->index = st->index;
map->str = outstr;
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
initialize_video_map(map, targetTrack, dataRef, dataRefType, storage->firstFrames + st->index);
else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
initialize_audio_map(map, targetTrack, dataRef, dataRefType, storage->firstFrames + st->index);
map->valid = map->media && map->sampleHdl;
/* return the map */
storage->stream_map = map;
return 0;
err:
if(map)
av_free(map);
return -1;
} /* prepare_track() */
/* A very large percent of movies have NTSC timebases (30/1.001) with misrounded fractions, so let's recover them. */
static void rescue_ntsc_timebase(AVRational *base)
{
av_reduce(&base->num, &base->den, base->num, base->den, INT_MAX);
if (base->num == 1) return; // FIXME: is this good enough?
double fTimebase = av_q2d(*base), nearest_ntsc = floor(fTimebase * 1001. + .5) / 1001.;
const double small_interval = 1./120.;
if (fabs(fTimebase - nearest_ntsc) < small_interval)
{
base->num = 1001;
base->den = (1001. / fTimebase) + .5;
}
}
/* Initializes the map & targetTrack to receive video data */
void initialize_video_map(NCStream *map, Track targetTrack, Handle dataRef, OSType dataRefType, AVPacket *firstFrame)
{
Media media;
ImageDescriptionHandle imgHdl;
Handle imgDescExt = NULL;
AVCodecContext *codec;
double num,den;
codec = map->str->codec;
map->base = map->str->time_base;
rescue_ntsc_timebase(&map->base);
if(map->base.num != 1001 && map->base.den > 100000) {
/* if that's the case, then we probably ran out of timevalues!
* a timescale of 100000 allows a movie duration of 5-6 hours
* so I think this will be enough */
den = map->base.den;
num = map->base.num;
/* we use the following approach ##.### frames per second.
* afterwards rounding */
den = den / num * 1000.0;
map->base.num = 1000;
map->base.den = round(den);
}
media = NewTrackMedia(targetTrack, VideoMediaType, map->base.den, dataRef, dataRefType);
map->media = media;
/* Create the Image Description Handle */
imgHdl = (ImageDescriptionHandle)NewHandleClear(sizeof(ImageDescription));
ImageDescriptionPtr imgPtr = *imgHdl;
imgPtr->idSize = sizeof(ImageDescription);
if (!(imgPtr->cType = map_video_codec_to_mov_tag(codec->codec_id)))
if(!(imgPtr->cType = BSWAP(codec->codec_tag)))
imgPtr->cType = forced_map_video_codec_to_mov_tag(codec->codec_id);
// FourCCprintf("fourcc: ", (*imgHdl)->cType);
imgPtr->temporalQuality = codecMaxQuality;
imgPtr->spatialQuality = codecMaxQuality;
imgPtr->width = codec->width;
imgPtr->height = codec->height;
imgPtr->hRes = 72 << 16;
imgPtr->vRes = 72 << 16;
imgPtr->depth = codec->bits_per_coded_sample;
imgPtr->clutID = -1; // no color lookup table...
// 12 is invalid in mov
// FIXME: it might be better to set this based entirely on pix_fmt
if (imgPtr->depth == 12 || imgPtr->depth == 0) imgPtr->depth = codec->pix_fmt == PIX_FMT_YUVA420P ? 32 : 24;
/* Create the strf image description extension (see AVI's BITMAPINFOHEADER) */
imgDescExt = create_strf_ext(codec);
if (imgDescExt) {
AddImageDescriptionExtension(imgHdl, imgDescExt, 'strf');
DisposeHandle(imgDescExt);
}
map->sampleHdl = (SampleDescriptionHandle)imgHdl;
} /* initialize_video_map() */
/* Initializes the map & targetTrack to receive audio data */
OSStatus initialize_audio_map(NCStream *map, Track targetTrack, Handle dataRef, OSType dataRefType, AVPacket *firstFrame)
{
Media media;
SoundDescriptionHandle sndHdl = NULL;
AudioStreamBasicDescription asbd;
AVCodecContext *codec;
UInt32 ioSize;
OSStatus err = noErr;
uint8_t *cookie = NULL;
size_t cookieSize = 0;
codec = map->str->codec;
map->base = map->str->time_base;
media = NewTrackMedia(targetTrack, SoundMediaType, codec->sample_rate, dataRef, dataRefType);
map->media = media;
memset(&asbd,0,sizeof(asbd));
map_avi_to_mov_tag(codec->codec_id, &asbd, map, codec->channels);
if(asbd.mFormatID == 0) /* no known codec, use the ms tag */
asbd.mFormatID = 'ms\0\0' + codec->codec_tag; /* the number is stored in the last byte => big endian */
/* Ask the AudioToolbox about vbr of the codec */
ioSize = sizeof(UInt32);
AudioFormatGetProperty(kAudioFormatProperty_FormatIsVBR, sizeof(AudioStreamBasicDescription), &asbd, &ioSize, &map->vbr);
cookie = create_cookie(codec, &cookieSize, asbd.mFormatID, map->vbr);
/* Set as much of the AudioStreamBasicDescription as possible.
* Then ask the codec to correct it by calling FormatInfo before creating the SoundDescriptionHandle.
* FormatInfo is poorly documented and doesn't set much of an example for 3rd party codecs but we can hope
* they'll overwrite bad values here.
*/
asbd.mSampleRate = codec->sample_rate;
asbd.mBytesPerPacket = codec->block_align;
asbd.mFramesPerPacket = codec->frame_size;
asbd.mChannelsPerFrame = codec->channels;
asbd.mBitsPerChannel = codec->bits_per_coded_sample;
/* ask the toolbox about more information */
ioSize = sizeof(AudioStreamBasicDescription);
err = AudioFormatGetProperty(kAudioFormatProperty_FormatInfo, cookieSize, cookie, &ioSize, &asbd);
// We can't recover from this (FormatInfo resets mFormatID for bad MPEG-4 AOTs)
if (!asbd.mFormatID || !asbd.mChannelsPerFrame) {
Codecprintf(NULL, "Audio channels or format not set\n");
goto bail;
}
// We might be able to recover from this (at least try to import the packets)
if (err) {
Codecprintf(NULL, "AudioFormatGetProperty failed (error %ld / format %lx)\n", err, asbd.mFormatID);
err = noErr;
}
// This needs to be set for playback to work, but 10.4 (+ AppleTV) didn't set it in FormatInfo.
// FIXME anything non-zero (like 1) might work here
if (!asbd.mFramesPerPacket && asbd.mFormatID == kAudioFormatMPEGLayer3)
asbd.mFramesPerPacket = asbd.mSampleRate > 24000 ? 1152 : 576;
// if we don't have mBytesPerPacket, we can't import as CBR. Probably should be VBR, and the codec
// either lied about kAudioFormatProperty_FormatIsVBR or isn't present
if (asbd.mBytesPerPacket == 0)
map->vbr = 1;
/* If we have vbr audio, the media scale most likely has to be set to the time_base denumerator */
if(map->vbr) {
/* if we have mFramesPerPacket, set mBytesPerPacket to 0 as this can cause
* errors if set incorrectly. But in vbr, we just need the mFramesPerPacket
* value */
if(asbd.mFramesPerPacket)
asbd.mBytesPerPacket = 0;
SetMediaTimeScale(media, map->str->time_base.den);
}
if (asbd.mFormatID == kAudioFormatLinearPCM)
asbd.mFramesPerPacket = 1;
else if (asbd.mBytesPerPacket) {
/* FIXME: in the MSADPCM codec, we get a wrong mFramesPerPacket entry because
* of the difference in the sample_rate and the time_base denumerator. So we
* recalculate here the mFramesPerPacket entry */
/* For calculation, lets assume a packet duration of 1, use ioSize as tmp storage */
ioSize = map->str->time_base.num * codec->sample_rate / map->str->time_base.den;
/* downscale to correct bytes_per_packet */
asbd.mFramesPerPacket = ioSize * asbd.mBytesPerPacket / codec->block_align;
}
AudioChannelLayout acl;
int aclSize = 0; //Set this if you intend to use it
memset(&acl, 0, sizeof(AudioChannelLayout));
/* We have to parse the format */
int useDefault = 1;
if(asbd.mFormatID == kAudioFormatAC3 || asbd.mFormatID == 'ms \0')
{
QTMetaDataRef trackMetaData;
OSStatus error = QTCopyTrackMetaData(targetTrack, &trackMetaData);
if(error == noErr)
{
const char *prop = "Surround";
OSType key = 'name';
QTMetaDataAddItem(trackMetaData, kQTMetaDataStorageFormatUserData, kQTMetaDataKeyFormatUserData, (UInt8 *)&key, sizeof(key), (UInt8 *)prop, strlen(prop), kQTMetaDataTypeUTF8, NULL);
QTMetaDataRelease(trackMetaData);
}
if(parse_ac3_bitstream(&asbd, &acl, firstFrame->data, firstFrame->size))
{
useDefault = 0;
aclSize = sizeof(AudioChannelLayout);
}
}
if(useDefault && asbd.mChannelsPerFrame > 2)
{
acl = GetDefaultChannelLayout(&asbd);
aclSize = sizeof(AudioChannelLayout);
}
if (asbd.mSampleRate > 0) {
err = QTSoundDescriptionCreate(&asbd, aclSize == 0 ? NULL : &acl, aclSize, cookie, cookieSize, kQTSoundDescriptionKind_Movie_LowestPossibleVersion, &sndHdl);
if(err) {
fprintf(stderr, "AVI IMPORTER: Error %ld creating the sound description\n", err);
goto bail;
}
}
map->sampleHdl = (SampleDescriptionHandle)sndHdl;
map->asbd = asbd;
bail:
if(cookie)
av_free(cookie);
return err;
} /* initialize_audio_map() */
OSType map_video_codec_to_mov_tag(enum CodecID codec_id)
{
switch(codec_id) {
case CODEC_ID_FLV1:
return 'FLV1';
case CODEC_ID_VP6F:
return 'VP6F';
case CODEC_ID_FLASHSV:
return 'FSV1';
case CODEC_ID_VP6A:
return 'VP6A';
default:
return 0;
}
}
OSType forced_map_video_codec_to_mov_tag(enum CodecID codec_id)
{
switch (codec_id) {
case CODEC_ID_H264:
return 'H264';
case CODEC_ID_MPEG4:
return 'MP4S';
default:
return 0;
}
}
/* maps the codec_id tag of libavformat to a constant the AudioToolbox can work with */
void map_avi_to_mov_tag(enum CodecID codec_id, AudioStreamBasicDescription *asbd, NCStream *map, int channels)
{
OSType fourcc = FFCodecIDToFourCC(codec_id);
if (fourcc)
asbd->mFormatID = fourcc;
switch(codec_id) {
case CODEC_ID_AC3:
map->vbr = 1;
break;
case CODEC_ID_PCM_S16LE:
asbd->mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
asbd->mBytesPerPacket = 2 * channels;
break;
case CODEC_ID_PCM_U8:
asbd->mFormatFlags = kLinearPCMFormatFlagIsBigEndian;
asbd->mBytesPerPacket = channels;
break;
case CODEC_ID_VORBIS:
asbd->mFormatID = 'OggV';
break;
case CODEC_ID_DTS:
map->vbr = 1;
break;
default:
;
}
} /* map_avi_to_mov_tag() */
/* This function creates a magic cookie basec on the codec parameter and formatID
* Return value: a pointer to a magic cookie which has to be av_free()'d
* in cookieSize, the size of the magic cookie is returned to the caller */
uint8_t *create_cookie(AVCodecContext *codec, size_t *cookieSize, UInt32 formatID, int vbr)
{
uint8_t *waveAtom = NULL;
PutByteContext p;
int waveSize;
if (formatID == kAudioFormatMPEG4AAC) {
return CreateEsdsFromSetupData(codec->extradata, codec->extradata_size, cookieSize, 1, true, false);
}
/* Do we need an endia atom, too? */
/* initialize the user Atom
* 8 bytes for the atom size & atom type
* 18 bytes for the already extracted part, see wav.c in the ffmpeg project
* extradata_size for the data still stored in the AVCodecContext structure */
waveSize = 18 + codec->extradata_size + 8;
waveAtom = av_malloc(waveSize);
if (!waveAtom)
goto bail;
bytestream2_init_writer(&p, waveAtom, waveSize);
/* now construct the wave atom */
/* QT Atoms are big endian, I think but the WAVE data should be little endian */
bytestream2_put_be32(&p, waveSize);
bytestream2_put_be32(&p, formatID);
bytestream2_put_le32(&p, codec->codec_tag);
bytestream2_put_le32(&p, codec->channels);
bytestream2_put_le32(&p, codec->sample_rate);
bytestream2_put_le32(&p, vbr ? 0 : codec->bit_rate / 8);
bytestream2_put_le16(&p, codec->block_align);
bytestream2_put_le16(&p, codec->bits_per_coded_sample);
bytestream2_put_le16(&p, codec->extradata_size);
/* now the remaining stuff */
bytestream2_put_buffer(&p, codec->extradata, codec->extradata_size);
bail:
*cookieSize = waveSize;
return waveAtom;
} /* create_cookie() */
/* This function creates an image description extension that some codecs need to be able
* to decode properly, a copy of the strf (BITMAPINFOHEADER) chunk in the avi.
* Return value: a handle to an image description extension which has to be DisposeHandle()'d
* in cookieSize, the size of the image description extension is returned to the caller */
Handle create_strf_ext(AVCodecContext *codec)
{
Handle result = NULL;
PutByteContext p;
int size;
/* initialize the extension
* 40 bytes for the BITMAPINFOHEADER stucture, see avienc.c in the ffmpeg project
* extradata_size for the data still stored in the AVCodecContext structure */
size = 40 + codec->extradata_size;
result = NewHandle(size);
if (result == NULL)
goto bail;
bytestream2_init_writer(&p, (uint8_t*)*result, size);
/* construct the BITMAPINFOHEADER structure */
/* QT Atoms are big endian, but the STRF atom should be little endian */
bytestream2_put_be32(&p, size);
bytestream2_put_le32(&p, codec->width);
bytestream2_put_le32(&p, codec->width);
bytestream2_put_le16(&p, 1); // planes
bytestream2_put_le16(&p, codec->bits_per_coded_sample ?: 24);
/* compression type */
bytestream2_put_le32(&p, codec->codec_tag);
bytestream2_put_le32(&p, codec->width * codec->height * 3);
bytestream2_put_le32(&p, 0);
bytestream2_put_le32(&p, 0);
bytestream2_put_le32(&p, 0);
bytestream2_put_le32(&p, 0);
/* now the remaining stuff */
bytestream2_put_buffer(&p, codec->extradata, codec->extradata_size);
if (codec->extradata_size & 1) {
bytestream2_put_byte(&p, 0);
}
bail:
return result;
} /* create_extension() */
/* Add the meta data that lavf exposes to the movie */
static void add_metadata(AVFormatContext *ic, Movie theMovie)
{
QTMetaDataRef movie_metadata;
OSType err;
err = QTCopyMovieMetaData(theMovie, &movie_metadata);
if (err) return;
void (^AddMetaDataItem)(const char *, OSType) = ^(const char *ff_name, OSType qt_name) {
AVDictionaryEntry *e = av_dict_get(ic->metadata, ff_name, NULL, 0);
if (!e) return;
QTMetaDataAddItem(movie_metadata, kQTMetaDataStorageFormatQuickTime, kQTMetaDataKeyFormatCommon,
(UInt8*)&qt_name, sizeof(qt_name), (UInt8*)e->value, strlen(e->value), kQTMetaDataTypeUTF8,
NULL);
};
AddMetaDataItem("title", kQTMetaDataCommonKeyDisplayName);
AddMetaDataItem("author", kQTMetaDataCommonKeyAuthor);
AddMetaDataItem("artist", kQTMetaDataCommonKeyArtist);
AddMetaDataItem("copyright", kQTMetaDataCommonKeyCopyright);
AddMetaDataItem("comment", kQTMetaDataCommonKeyComment);
AddMetaDataItem("album", kQTMetaDataCommonKeyAlbum);
AddMetaDataItem("genre", kQTMetaDataCommonKeyGenre);
AddMetaDataItem("composer", kQTMetaDataCommonKeyComposer);
AddMetaDataItem("encoder", kQTMetaDataCommonKeySoftware);
// TODO iTunes track number, disc number, ...
QTMetaDataRelease(movie_metadata);
}
static void get_track_dimensions_for_codec(AVStream *st, Fixed *fixedWidth, Fixed *fixedHeight)
{
AVCodecContext *codec = st->codec;
*fixedHeight = IntToFixed(codec->height);
if (!st->sample_aspect_ratio.num) *fixedWidth = IntToFixed(codec->width);
else *fixedWidth = FloatToFixed(codec->width * av_q2d(st->sample_aspect_ratio));
}
// Create the 'pasp' atom for video tracks. No guesswork required.
// References http://www.uwasa.fi/~f76998/video/conversion/
void set_track_clean_aperture_ext(ImageDescriptionHandle imgDesc, Fixed displayW, Fixed displayH, Fixed pixelW, Fixed pixelH)
{
if (displayW == pixelW && displayH == pixelH)
return;
AVRational dar, invPixelSize, sar;
dar = (AVRational){displayW, displayH};
invPixelSize = (AVRational){pixelH, pixelW};
sar = av_mul_q(dar, invPixelSize);
av_reduce(&sar.num, &sar.den, sar.num, sar.den, fixed1);
if (sar.num == sar.den)
return;
PixelAspectRatioImageDescriptionExtension **pasp = (PixelAspectRatioImageDescriptionExtension**)NewHandle(sizeof(PixelAspectRatioImageDescriptionExtension));
**pasp = (PixelAspectRatioImageDescriptionExtension){EndianU32_NtoB(sar.num), EndianU32_NtoB(sar.den)};
AddImageDescriptionExtension(imgDesc, (Handle)pasp, kPixelAspectRatioImageDescriptionExtension);
DisposeHandle((Handle)pasp);
}
// Create the 'nclc' atom for video tracks. Guessed entirely from image size following ffdshow.
// FIXME: read H.264 VUI/MPEG2 etc and especially read chroma positioning information.
// this needs the parsers working
// References: http://developer.apple.com/quicktime/icefloe/dispatch019.html
// http://www.mir.com/DMG/chroma.html
void set_track_colorspace_ext(ImageDescriptionHandle imgDescHandle, Fixed displayW, Fixed displayH)
{
ImageDescription *imgDesc = *imgDescHandle;
Boolean isHd, isPAL; // otherwise NTSC
AVRational palRatio = (AVRational){5, 4}, displayRatio = (AVRational){displayW, displayH};
int colorPrimaries, transferFunction, yuvMatrix;
isHd = imgDesc->height > 576;
isPAL = imgDesc->height == 576 || av_cmp_q(palRatio, displayRatio) == 0;
NCLCColorInfoImageDescriptionExtension **nclc = (NCLCColorInfoImageDescriptionExtension**)NewHandle(sizeof(NCLCColorInfoImageDescriptionExtension));
if (isHd) {
colorPrimaries = kQTPrimaries_ITU_R709_2;
transferFunction = kQTTransferFunction_ITU_R709_2;
yuvMatrix = kQTMatrix_ITU_R_709_2;
} else if (isPAL) {
colorPrimaries = kQTPrimaries_EBU_3213;
transferFunction = kQTTransferFunction_ITU_R709_2;
yuvMatrix = kQTMatrix_ITU_R_601_4;
} else {
colorPrimaries = kQTPrimaries_SMPTE_C;
transferFunction = kQTTransferFunction_ITU_R709_2;
yuvMatrix = kQTMatrix_ITU_R_601_4;
}
**nclc = (NCLCColorInfoImageDescriptionExtension){EndianU32_NtoB(kVideoColorInfoImageDescriptionExtensionType),
EndianU16_NtoB(colorPrimaries),
EndianU16_NtoB(transferFunction),
EndianU16_NtoB(yuvMatrix)};
AddImageDescriptionExtension(imgDescHandle, (Handle)nclc, kColorInfoImageDescriptionExtension);
DisposeHandle((Handle)nclc);
}
/* This function prepares the movie to receivve the movie data,
* After success, *out_map points to a valid stream maping
* Return values:
* 0: ok
*/
OSStatus prepare_movie(ff_global_ptr storage, Movie theMovie, Handle dataRef, OSType dataRefType)
{
int j;
AVStream *st;
NCStream *map;
Track track = NULL;
Track first_audio_track = NULL;
AVFormatContext *ic = storage->format_context;
OSStatus err = noErr;
/* make the stream map structure */
map = av_mallocz(ic->nb_streams * sizeof(NCStream));
for(j = 0; j < ic->nb_streams; j++) {
st = ic->streams[j];
map[j].index = st->index;
map[j].str = st;
map[j].duration = -1;
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
Fixed width, height;
get_track_dimensions_for_codec(st, &width, &height);
track = NewMovieTrack(theMovie, width, height, kNoVolume);
// Support for 'old' NUV files, that didn't put the codec_tag in the file.
if( st->codec->codec_id == CODEC_ID_NUV && st->codec->codec_tag == 0 ) {
st->codec->codec_tag = MKTAG( 'N', 'U', 'V', '1' );
}
initialize_video_map(&map[j], track, dataRef, dataRefType, storage->firstFrames + j);
set_track_clean_aperture_ext((ImageDescriptionHandle)map[j].sampleHdl, width, height, IntToFixed(st->codec->width), IntToFixed(st->codec->height));
set_track_colorspace_ext((ImageDescriptionHandle)map[j].sampleHdl, width, height);
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
if (st->codec->sample_rate > 0) {
track = NewMovieTrack(theMovie, 0, 0, kFullVolume);
err = initialize_audio_map(&map[j], track, dataRef, dataRefType, storage->firstFrames + j);
if (first_audio_track == NULL)
first_audio_track = track;
else
SetTrackAlternate(track, first_audio_track);
}
} else
continue;
// can't import samples if neither of these were created.
map[j].valid = map[j].media && map[j].sampleHdl;
if (err) {
if (track)
DisposeMovieTrack(track);
return err;
}
}
add_metadata(ic, theMovie);
storage->stream_map = map;
return 0;
} /* prepare_movie() */
int determine_header_offset(ff_global_ptr storage) {
AVFormatContext *formatContext;
AVPacket packet;
int result, i;
formatContext = storage->format_context;
result = noErr;
storage->header_offset = 0;
/* Seek backwards to get a manually read packet for file offset */
if(formatContext->streams[0]->index_entries == NULL || storage->componentType == 'FLV ')
{
storage->header_offset = 0;
}
else
{
int streamsRead = 0;
AVStream *st;
result = av_seek_frame(formatContext, -1, 0, AVSEEK_FLAG_ANY);
if(result < 0) goto bail;
result = av_read_frame(formatContext, &packet);
if(result < 0) goto bail;
st = formatContext->streams[packet.stream_index];
/* read_packet will give the first decodable packet. However, that isn't necessarily
the first entry in the index, so look for an entry with a matching size. */
for (i = 0; i < st->nb_index_entries; i++) {
if (packet.dts == st->index_entries[i].timestamp) {
storage->header_offset = packet.pos - st->index_entries[i].pos;
break;
}
}
while(streamsRead < formatContext->nb_streams)
{
int streamIndex = packet.stream_index;
if(storage->firstFrames[streamIndex].size == 0)
{
memcpy(storage->firstFrames + streamIndex, &packet, sizeof(AVPacket));
streamsRead++;
if(streamsRead == formatContext->nb_streams)
break;
}
else
av_free_packet(&packet);
int status = formatContext->iformat->read_packet(formatContext, &packet);
if(status < 0)
break;
}
// seek back to the beginning, otherwise av_read_frame-based decoding will skip a few packets.
av_seek_frame(formatContext, -1, 0, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
}
bail:
return result;
}
/* This function imports the avi represented by the AVFormatContext to the movie media represented
* in the map function. The aviheader_offset is used to calculate the packet offset from the
* beginning of the file. It returns whether it was successful or not (i.e. whether the file had an index) */
int import_using_index(ff_global_ptr storage, int *hadIndex, TimeValue *addedDuration) {
int j, k, l;
NCStream *map;
NCStream *ncstr;
AVFormatContext *ic;
AVStream *stream;
AVCodecContext *codec;
SampleReference64Ptr sampleRec;
int64_t header_offset, offset, duration;
short flags;
int sampleNum;
ComponentResult result = noErr;
map = storage->stream_map;
ic = storage->format_context;
header_offset = storage->header_offset;
if(*hadIndex == 0)
goto bail;
//FLVs have unusable indexes, so don't even bother.
if(storage->componentType == 'FLV ')
goto bail;
/* process each stream in ic */
for(j = 0; j < ic->nb_streams; j++) {
ncstr = &map[j];
stream = ncstr->str;
codec = stream->codec;
/* no stream we can read */
if(!ncstr->valid)
continue;
/* no index, we might as well skip */
if(stream->nb_index_entries == 0)
continue;
sampleNum = 0;
ncstr->sampleTable = calloc(stream->nb_index_entries, sizeof(SampleReference64Record));
/* now parse the index entries */
for(k = 0; k < stream->nb_index_entries; k++) {
/* file offset */
offset = header_offset + stream->index_entries[k].pos;
/* flags */
flags = 0;
if((stream->index_entries[k].flags & AVINDEX_KEYFRAME) == 0)
flags |= mediaSampleNotSync;
sampleRec = &ncstr->sampleTable[sampleNum++];
/* set as many fields in sampleRec as possible */
sampleRec->dataOffset.hi = offset >> 32;
sampleRec->dataOffset.lo = (uint32_t)offset;
sampleRec->dataSize = stream->index_entries[k].size;
sampleRec->sampleFlags = flags;
/* some samples have a data_size of zero. if that's the case, ignore them
* they seem to be used to stretch the frame duration & are already handled
* by the previous pkt */
if(sampleRec->dataSize <= 0) {
sampleNum--;
continue;
}
/* switch for the remaining fields */
if(codec->codec_type == AVMEDIA_TYPE_VIDEO) {
/* Calculate the frame duration */
duration = 1;
for(l = k+1; l < stream->nb_index_entries; l++) {
if(stream->index_entries[l].size > 0)
break;
duration++;
}
sampleRec->durationPerSample = map->base.num * duration;
sampleRec->numberOfSamples = 1;
}
else if(codec->codec_type == AVMEDIA_TYPE_AUDIO) {
/* FIXME: check if that's really the right thing to do here */
if(ncstr->vbr) {
sampleRec->numberOfSamples = 1;
if (k + 1 < stream->nb_index_entries)
sampleRec->durationPerSample = (stream->index_entries[k+1].timestamp - stream->index_entries[k].timestamp) * ncstr->base.num;
else if (sampleNum - 2 >= 0)
// if we're at the last index entry, use the duration of the previous sample
// FIXME: this probably could be better
sampleRec->durationPerSample = ncstr->sampleTable[sampleNum-2].durationPerSample;
} else {
sampleRec->durationPerSample = 1;
sampleRec->numberOfSamples = (stream->index_entries[k].size * ncstr->asbd.mFramesPerPacket) / ncstr->asbd.mBytesPerPacket;
}
}
}
if(sampleNum != 0)
{
/* Add all of the samples to the media */
AddMediaSampleReferences64(ncstr->media, ncstr->sampleHdl, sampleNum, ncstr->sampleTable, NULL);
/* The index is both present and not empty */
*hadIndex = 1;
}
free(ncstr->sampleTable);
}
if(*hadIndex == 0)
//No index, the remainder of this function will fail.
goto bail;
// insert media and set addedDuration;
for(j = 0; j < storage->map_count && result == noErr; j++) {
ncstr = &map[j];
if(ncstr->valid) {
Media media = ncstr->media;
Track track;
TimeRecord time;
TimeValue mediaDuration;
TimeScale mediaTimeScale;
TimeScale movieTimeScale;
int startTime = map[j].str->index_entries[0].timestamp;
mediaDuration = GetMediaDuration(media);
mediaTimeScale = GetMediaTimeScale(media);
movieTimeScale = GetMovieTimeScale(storage->movie);
/* we could handle this stream.
* convert the atTime parameter to track scale.
* FIXME: check if that's correct */
time.value.hi = 0;
time.value.lo = storage->atTime;
time.scale = movieTimeScale;
time.base = NULL;
ConvertTimeScale(&time, mediaTimeScale);
track = GetMediaTrack(media);
result = InsertMediaIntoTrack(track, time.value.lo, 0, mediaDuration, fixed1);
// set audio/video start delay
// note str.start_time exists but is always 0 for AVI
if (startTime) {
TimeRecord startTimeRec;
startTimeRec.value.hi = 0;
startTimeRec.value.lo = startTime * map[j].str->time_base.num;
startTimeRec.scale = map[j].str->time_base.den;
startTimeRec.base = NULL;
ConvertTimeScale(&startTimeRec, movieTimeScale);
SetTrackOffset(track, startTimeRec.value.lo);
}
if(result != noErr)
goto bail;
time.value.hi = 0;
time.value.lo = mediaDuration;
time.scale = mediaTimeScale;
time.base = NULL;
ConvertTimeScale(&time, movieTimeScale);
if(time.value.lo > *addedDuration)
*addedDuration = time.value.lo;
}
}
storage->loadedTime = *addedDuration;
bail:
return result;
} /* import_using_index() */
/* Import function for movies that lack an index.
* Supports progressive importing, but will not idle if maxFrames == 0.
*/
ComponentResult import_with_idle(ff_global_ptr storage, long inFlags, long *outFlags, int minFrames, int maxFrames, bool addSamples) {
SampleReference64Record sampleRec;
AVFormatContext *formatContext;
AVCodecContext *codecContext;
AVStream *stream;
AVPacket packet;
NCStream *ncstream;
ComponentResult dataResult; //used for data handler operations that can fail.
ComponentResult result;
TimeValue minLoadedTime;
TimeValue movieTimeScale = GetMovieTimeScale(storage->movie);
int64_t availableSize, margin;
long idling;
int readResult, framesProcessed, i;
int firstPts[storage->map_count];
short flags;
formatContext = storage->format_context;
result = noErr;
minLoadedTime = -1;
availableSize = 0;
idling = (inFlags & movieImportWithIdle);
framesProcessed = 0;
if(idling) {
//get the size of immediately available data
if(storage->dataHandlerSupportsWideOffsets) {
wide wideSize;
dataResult = DataHGetAvailableFileSize64(storage->dataHandler, &wideSize);
if(dataResult == noErr) availableSize = ((int64_t)wideSize.hi << 32) + wideSize.lo;
} else {
long longSize;
dataResult = DataHGetAvailableFileSize(storage->dataHandler, &longSize);
if(dataResult == noErr) availableSize = longSize;
}
}
for(i = 0; i < storage->map_count; i++) {
ncstream = &storage->stream_map[i];
Media media = ncstream->media;
firstPts[i] = -1;
if(media && ncstream->duration == -1)
ncstream->duration = GetMediaDuration(media);
}
while((readResult = av_read_frame(formatContext, &packet)) == 0) {
bool trustPacketDuration = true;
int64_t dts = packet.dts;
ncstream = &storage->stream_map[packet.stream_index];
stream = ncstream->str;
codecContext = stream->codec;
flags = 0;
if (!ncstream->valid)
continue;
if((packet.flags & AV_PKT_FLAG_KEY) == 0)
flags |= mediaSampleNotSync;
if(IS_NUV(storage->componentType) && codecContext->codec_id == CODEC_ID_MP3) trustPacketDuration = false;
if(IS_FLV(storage->componentType)) trustPacketDuration = false;
memset(&sampleRec, 0, sizeof(sampleRec));
sampleRec.dataOffset.hi = packet.pos >> 32;
sampleRec.dataOffset.lo = (uint32_t)packet.pos;
sampleRec.dataSize = packet.size;
sampleRec.sampleFlags = flags;
if (packet.pos <= 0)
continue;
if(firstPts[packet.stream_index] < 0)
firstPts[packet.stream_index] = packet.pts;
if(packet.size > storage->largestPacketSize)
storage->largestPacketSize = packet.size;
if(sampleRec.dataSize <= 0)
continue;
if(codecContext->codec_type == AVMEDIA_TYPE_AUDIO && !ncstream->vbr)
sampleRec.numberOfSamples = (packet.size * ncstream->asbd.mFramesPerPacket) / ncstream->asbd.mBytesPerPacket;
else
sampleRec.numberOfSamples = 1; //packet.duration;
//add any samples waiting to be added
if(ncstream->lastSample.numberOfSamples > 0) {
//calculate the duration of the sample before adding it
ncstream->lastSample.durationPerSample = (dts - ncstream->lastdts) * ncstream->base.num;
AddMediaSampleReferences64(ncstream->media, ncstream->sampleHdl, 1, &ncstream->lastSample, NULL);
}
#if 0
if (0) {
Codecprintf(NULL, "Stream:%d Pts:%lld Dts:%lld DtsUsed:%lld Pos:%lld Size:%d\n", packet.stream_index, packet.pts, packet.dts, dts, packet.pos, packet.size);
Codecprintf(NULL, "Stream:%d Nsamples:%ld RealDuration:%d CalcDuration:%ld TimeDts:%lld TimeDurations:%lld FrameDts:%d FrameGuess:%lld\n",
packet.stream_index, sampleRec.numberOfSamples, packet.duration, ncstream->lastSample.durationPerSample,
packet.dts, ncstream->timeByDurations, (int)((packet.dts * stream->time_base.num * ncstream->asbd.mSampleRate) / stream->time_base.den),
ncstream->timeByFrames);
ncstream->timeByDurations += packet.duration;
ncstream->timeByFrames += ncstream->asbd.mFramesPerPacket;
}
#endif
ncstream->lastSample = sampleRec;
ncstream->lastdts = packet.dts;
// If this is a nuv file, then we want to set the duration to zero.