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diff --git a/Src/external_dependencies/libmp4v2/mp4info.cpp b/Src/external_dependencies/libmp4v2/mp4info.cpp
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+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is MPEG4IP.
+ *
+ * The Initial Developer of the Original Code is Cisco Systems Inc.
+ * Portions created by Cisco Systems Inc. are
+ * Copyright (C) Cisco Systems Inc. 2001-2002. All Rights Reserved.
+ *
+ * Portions created by Ximpo Group Ltd. are
+ * Copyright (C) Ximpo Group Ltd. 2003, 2004. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Dave Mackie dmackie@cisco.com
+ * Bill May wmay@cisco.com
+ * Alix Marchandise-Franquet alix@cisco.com
+ * Ximpo Group Ltd. mp4v2@ximpo.com
+ */
+
+#include "mp4common.h"
+
+extern "C" char* MP4PrintAudioInfo(
+ MP4FileHandle mp4File,
+ MP4TrackId trackId)
+{
+ static const char* mpeg4AudioNames[] =
+ {
+ "MPEG-4 AAC main",
+ "MPEG-4 AAC LC",
+ "MPEG-4 AAC SSR",
+ "MPEG-4 AAC LTP",
+ "MPEG-4 AAC HE",
+ "MPEG-4 AAC Scalable",
+ "MPEG-4 TwinVQ",
+ "MPEG-4 CELP",
+ "MPEG-4 HVXC",
+ NULL, NULL,
+ "MPEG-4 TTSI",
+ "MPEG-4 Main Synthetic",
+ "MPEG-4 Wavetable Syn",
+ "MPEG-4 General MIDI",
+ "MPEG-4 Algo Syn and Audio FX",
+ "MPEG-4 ER AAC LC",
+ NULL,
+ "MPEG-4 ER AAC LTP",
+ "MPEG-4 ER AAC Scalable",
+ "MPEG-4 ER TwinVQ",
+ "MPEG-4 ER BSAC",
+ "MPEG-4 ER ACC LD",
+ "MPEG-4 ER CELP",
+ "MPEG-4 ER HVXC",
+ "MPEG-4 ER HILN",
+ "MPEG-4 ER Parametric",
+ "MPEG-4 SSC",
+ "MPEG-4 PS",
+ "MPEG-4 MPEG Surround",
+ NULL,
+ "MPEG-4 Layer-1",
+ "MPEG-4 Layer-2",
+ "MPEG-4 Layer-3",
+ "MPEG-4 DST",
+ "MPEG-4 Audio Lossless",
+ "MPEG-4 SLS",
+ "MPEG-4 SLS non-core",
+ };
+
+ static const u_int8_t mpegAudioTypes[] =
+ {
+ MP4_MPEG2_AAC_MAIN_AUDIO_TYPE, // 0x66
+ MP4_MPEG2_AAC_LC_AUDIO_TYPE, // 0x67
+ MP4_MPEG2_AAC_SSR_AUDIO_TYPE, // 0x68
+ MP4_MPEG2_AUDIO_TYPE, // 0x69
+ MP4_MPEG1_AUDIO_TYPE, // 0x6B
+ // private types
+ MP4_PCM16_LITTLE_ENDIAN_AUDIO_TYPE,
+ MP4_VORBIS_AUDIO_TYPE,
+ MP4_ALAW_AUDIO_TYPE,
+ MP4_ULAW_AUDIO_TYPE,
+ MP4_G723_AUDIO_TYPE,
+ MP4_PCM16_BIG_ENDIAN_AUDIO_TYPE,
+ };
+ static const char* mpegAudioNames[] =
+ {
+ "MPEG-2 AAC Main",
+ "MPEG-2 AAC LC",
+ "MPEG-2 AAC SSR",
+ "MPEG-2 Audio (13818-3)",
+ "MPEG-1 Audio (11172-3)",
+ // private types
+ "PCM16 (little endian)",
+ "Vorbis",
+ "G.711 aLaw",
+ "G.711 uLaw",
+ "G.723.1",
+ "PCM16 (big endian)",
+ };
+ u_int8_t numMpegAudioTypes =
+ sizeof(mpegAudioTypes) / sizeof(u_int8_t);
+
+ const char* typeName = "Unknown";
+ bool foundType = false;
+ u_int8_t type = 0;
+ const char *media_data_name;
+
+ media_data_name = MP4GetTrackMediaDataName(mp4File, trackId);
+ u_int32_t timeScale = 0;
+ if (media_data_name == NULL)
+ {
+ typeName = "Unknown - no media data name";
+ }
+ else if (strcasecmp(media_data_name, "samr") == 0)
+ {
+ typeName = "AMR";
+ foundType = true;
+ }
+ else if (strcasecmp(media_data_name, "sawb") == 0)
+ {
+ typeName = "AMR-WB";
+ foundType = true;
+ }
+ else if (strcasecmp(media_data_name, "mp4a") == 0)
+ {
+
+ type = MP4GetTrackEsdsObjectTypeId(mp4File, trackId);
+ switch (type)
+ {
+ case MP4_INVALID_AUDIO_TYPE:
+ typeName = "AAC from .mov";
+ foundType = true;
+ break;
+ case MP4_MPEG4_AUDIO_TYPE:
+ {
+ type = MP4GetTrackAudioMpeg4Type(mp4File, trackId);
+ if (type == MP4_MPEG4_INVALID_AUDIO_TYPE ||
+ type > NUM_ELEMENTS_IN_ARRAY(mpeg4AudioNames) ||
+ mpeg4AudioNames[type - 1] == NULL)
+ {
+ typeName = "MPEG-4 Unknown Profile";
+ }
+ else
+ {
+ if (type == 2)
+ {
+ u_int8_t* pAacConfig = NULL;
+ u_int32_t aacConfigLength;
+
+ MP4GetTrackESConfiguration(mp4File,
+ trackId,
+ &pAacConfig,
+ &aacConfigLength);
+
+ if (aacConfigLength >= 5 && (pAacConfig[4] >> 7) == 1)
+ {
+ int samplingRates[]={96000,88200,64000,48000,44100,32000,24000,22050,16000,12000,11025,8000,-1};
+ type = 5;
+ int index = (pAacConfig[4] >> 3) & 0x7;
+ timeScale = samplingRates[index];
+ }
+ MP4Free(pAacConfig);
+ }
+ typeName = mpeg4AudioNames[type - 1];
+ foundType = true;
+ }
+ break;
+ }
+ // fall through
+ default:
+ for (u_int8_t i = 0; i < numMpegAudioTypes; i++)
+ {
+ if (type == mpegAudioTypes[i])
+ {
+ typeName = mpegAudioNames[i];
+ foundType = true;
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ typeName = media_data_name;
+ foundType = true;
+ }
+
+ if (!timeScale)
+ timeScale = MP4GetTrackTimeScale(mp4File, trackId);
+
+ MP4Duration trackDuration =
+ MP4GetTrackDuration(mp4File, trackId);
+
+ double msDuration =
+ UINT64_TO_DOUBLE(MP4ConvertFromTrackDuration(mp4File, trackId,
+ trackDuration, MP4_MSECS_TIME_SCALE));
+
+
+ char *sInfo = (char*)MP4Malloc(256);
+
+ // type duration avgBitrate samplingFrequency
+ if (foundType)
+ snprintf(sInfo, 256,
+ "%s",
+ typeName);
+ else
+ snprintf(sInfo, 256,
+ "%s(%u)",
+ typeName,
+ type);
+
+ return sInfo;
+}
+static const struct
+{
+ uint8_t profile;
+ const char *name;
+}
+VisualProfileToName[] = {
+ { MPEG4_SP_L1, "MPEG-4 Simple @ L1"},
+ { MPEG4_SP_L2, "MPEG-4 Simple @ L2" },
+ { MPEG4_SP_L3, "MPEG-4 Simple @ L3" },
+ { MPEG4_SP_L0, "MPEG-4 Simple @ L0" },
+ { MPEG4_SSP_L1, "MPEG-4 Simple Scalable @ L1"},
+ { MPEG4_SSP_L2, "MPEG-4 Simple Scalable @ L2" },
+ { MPEG4_CP_L1, "MPEG-4 Core @ L1"},
+ { MPEG4_CP_L2, "MPEG-4 Core @ L2"},
+ { MPEG4_MP_L2, "MPEG-4 Main @ L2"},
+ { MPEG4_MP_L3, "MPEG-4 Main @ L3"},
+ { MPEG4_MP_L4, "MPEG-4 Main @ L4"},
+ { MPEG4_NBP_L2, "MPEG-4 N-bit @ L2"},
+ { MPEG4_STP_L1, "MPEG-4 Scalable Texture @ L1"},
+ { MPEG4_SFAP_L1, "MPEG-4 Simple Face Anim @ L1"},
+ { MPEG4_SFAP_L2, "MPEG-4 Simple Face Anim @ L2"},
+ { MPEG4_SFBAP_L1, "MPEG-4 Simple FBA @ L1"},
+ { MPEG4_SFBAP_L2, "MPEG-4 Simple FBA @ L2"},
+ { MPEG4_BATP_L1, "MPEG-4 Basic Anim Text @ L1"},
+ { MPEG4_BATP_L2, "MPEG-4 Basic Anim Text @ L2"},
+ { MPEG4_HP_L1, "MPEG-4 Hybrid @ L1"},
+ { MPEG4_HP_L2, "MPEG-4 Hybrid @ L2"},
+ { MPEG4_ARTSP_L1, "MPEG-4 Adv RT Simple @ L1"},
+ { MPEG4_ARTSP_L2, "MPEG-4 Adv RT Simple @ L2"},
+ { MPEG4_ARTSP_L3, "MPEG-4 Adv RT Simple @ L3"},
+ { MPEG4_ARTSP_L4, "MPEG-4 Adv RT Simple @ L4"},
+ { MPEG4_CSP_L1, "MPEG-4 Core Scalable @ L1"},
+ { MPEG4_CSP_L2, "MPEG-4 Core Scalable @ L2"},
+ { MPEG4_CSP_L3, "MPEG-4 Core Scalable @ L3"},
+ { MPEG4_ACEP_L1, "MPEG-4 Adv Coding Efficieny @ L1"},
+ { MPEG4_ACEP_L2, "MPEG-4 Adv Coding Efficieny @ L2"},
+ { MPEG4_ACEP_L3, "MPEG-4 Adv Coding Efficieny @ L3"},
+ { MPEG4_ACEP_L4, "MPEG-4 Adv Coding Efficieny @ L4"},
+ { MPEG4_ACP_L1, "MPEG-4 Adv Core Profile @ L1"},
+ { MPEG4_ACP_L2, "MPEG-4 Adv Core Profile @ L2"},
+ { MPEG4_AST_L1, "MPEG-4 Adv Scalable Texture @ L1"},
+ { MPEG4_AST_L2, "MPEG-4 Adv Scalable Texture @ L2"},
+ { MPEG4_AST_L3, "MPEG-4 Adv Scalable Texture @ L3"},
+ { MPEG4_S_STUDIO_P_L1, "MPEG-4 Simple Studio @ L1"},
+ { MPEG4_S_STUDIO_P_L2, "MPEG-4 Simple Studio @ L2"},
+ { MPEG4_S_STUDIO_P_L3, "MPEG-4 Simple Studio @ L3"},
+ { MPEG4_S_STUDIO_P_L4, "MPEG-4 Simple Studio @ L4"},
+ { MPEG4_C_STUDIO_P_L1, "MPEG-4 Core Studio @ L1"},
+ { MPEG4_C_STUDIO_P_L2, "MPEG-4 Core Studio @ L2"},
+ { MPEG4_C_STUDIO_P_L3, "MPEG-4 Core Studio @ L3"},
+ { MPEG4_C_STUDIO_P_L4, "MPEG-4 Core Studio @ L4"},
+ { MPEG4_ASP_L0, "MPEG-4 Adv Simple@L0"},
+ { MPEG4_ASP_L1, "MPEG-4 Adv Simple@L1"},
+ { MPEG4_ASP_L2, "MPEG-4 Adv Simple@L2"},
+ { MPEG4_ASP_L3, "MPEG-4 Adv Simple@L3"},
+ { MPEG4_ASP_L4, "MPEG-4 Adv Simple@L4"},
+ { MPEG4_ASP_L5, "MPEG-4 Adv Simple@L5"},
+ { MPEG4_ASP_L3B, "MPEG-4 Adv Simple@L3b"},
+ { MPEG4_FGSP_L0, "MPEG-4 FGS @ L0" },
+ { MPEG4_FGSP_L1, "MPEG-4 FGS @ L1" },
+ { MPEG4_FGSP_L2, "MPEG-4 FGS @ L2" },
+ { MPEG4_FGSP_L3, "MPEG-4 FGS @ L3" },
+ { MPEG4_FGSP_L4, "MPEG-4 FGS @ L4" },
+ { MPEG4_FGSP_L5, "MPEG-4 FGS @ L5" }
+ };
+
+static const char *Mpeg4VisualProfileName(uint8_t visual_profile)
+{
+ size_t size = sizeof(VisualProfileToName) / sizeof(*VisualProfileToName);
+
+ for (size_t ix = 0; ix < size; ix++)
+ {
+ if (visual_profile == VisualProfileToName[ix].profile)
+ {
+ return (VisualProfileToName[ix].name);
+ }
+ }
+ return (NULL);
+}
+extern "C" char* MP4PrintVideoInfo(
+ MP4FileHandle mp4File,
+ MP4TrackId trackId)
+{
+
+ static const u_int8_t mpegVideoTypes[] =
+ {
+ MP4_MPEG2_SIMPLE_VIDEO_TYPE, // 0x60
+ MP4_MPEG2_MAIN_VIDEO_TYPE, // 0x61
+ MP4_MPEG2_SNR_VIDEO_TYPE, // 0x62
+ MP4_MPEG2_SPATIAL_VIDEO_TYPE, // 0x63
+ MP4_MPEG2_HIGH_VIDEO_TYPE, // 0x64
+ MP4_MPEG2_442_VIDEO_TYPE, // 0x65
+ MP4_MPEG1_VIDEO_TYPE, // 0x6A
+ MP4_JPEG_VIDEO_TYPE, // 0x6C
+ MP4_YUV12_VIDEO_TYPE,
+ MP4_H263_VIDEO_TYPE,
+ MP4_H261_VIDEO_TYPE,
+ };
+ static const char* mpegVideoNames[] =
+ {
+ "MPEG-2 Simple",
+ "MPEG-2 Main",
+ "MPEG-2 SNR",
+ "MPEG-2 Spatial",
+ "MPEG-2 High",
+ "MPEG-2 4:2:2",
+ "MPEG-1",
+ "JPEG",
+ "YUV12",
+ "H.263",
+ "H.261",
+ };
+ u_int8_t numMpegVideoTypes =
+ sizeof(mpegVideoTypes) / sizeof(u_int8_t);
+ bool foundTypeName = false;
+ const char* typeName = "Unknown";
+
+ const char *media_data_name;
+ char originalFormat[8];
+ char oformatbuffer[32];
+ originalFormat[0] = 0;
+ *oformatbuffer = 0;
+ uint8_t type = 0;
+
+ media_data_name = MP4GetTrackMediaDataName(mp4File, trackId);
+ // encv 264b
+ if (media_data_name && strcasecmp(media_data_name, "encv") == 0)
+ {
+ if (MP4GetTrackMediaDataOriginalFormat(mp4File,
+ trackId,
+ originalFormat,
+ sizeof(originalFormat)) == false)
+ media_data_name = NULL;
+ }
+
+ char typebuffer[80];
+ if (media_data_name == NULL)
+ {
+ typeName = "Unknown - no media data name";
+ foundTypeName = true;
+ }
+ else if ((strcasecmp(media_data_name, "avc1") == 0) ||
+ (strcasecmp(originalFormat, "264b") == 0))
+ {
+ // avc
+ uint8_t profile, level;
+ char profileb[20], levelb[20];
+ if (MP4GetTrackH264ProfileLevel(mp4File, trackId,
+ &profile, &level))
+ {
+ if (profile == 44)
+ {
+ strcpy(profileb, "CAVLC 4:4:4");
+ }
+ else if (profile == 66)
+ {
+ strcpy(profileb, "Baseline");
+ }
+ else if (profile == 77)
+ {
+ strcpy(profileb, "Main");
+ }
+ else if (profile == 88)
+ {
+ strcpy(profileb, "Extended");
+ }
+ else if (profile == 100)
+ {
+ strcpy(profileb, "High");
+ }
+ else if (profile == 110)
+ {
+ strcpy(profileb, "High 10");
+ }
+ else if (profile == 122)
+ {
+ strcpy(profileb, "High 4:2:2");
+ }
+ else if (profile == 144 || profile == 244)
+ {
+ strcpy(profileb, "High 4:4:4");
+ }
+ else
+ {
+ snprintf(profileb, 20, "Unknown Profile %x", profile);
+ }
+ switch (level)
+ {
+case 10: case 20: case 30: case 40: case 50:
+ snprintf(levelb, 20, "%u", level / 10);
+ break;
+ case 11: case 12: case 13:
+ case 21: case 22:
+ case 31: case 32:
+ case 41: case 42:
+ case 51:
+ snprintf(levelb, 20, "%u.%u", level / 10, level % 10);
+ break;
+ default:
+ snprintf(levelb, 20, "unknown level %x", level);
+ break;
+ }
+ if (originalFormat != NULL && originalFormat[0] != '\0')
+ snprintf(oformatbuffer, 32, "(%s) ", originalFormat);
+ snprintf(typebuffer, sizeof(typebuffer), "H.264 %s%s@%s",
+ oformatbuffer, profileb, levelb);
+ typeName = typebuffer;
+ }
+ else
+ {
+ typeName = "H.264 - profile/level error";
+ }
+ foundTypeName = true;
+ }
+ else if (strcasecmp(media_data_name, "s263") == 0)
+ {
+ // 3gp h.263
+ typeName = "H.263";
+ foundTypeName = true;
+ }
+ else if ((strcasecmp(media_data_name, "mp4v") == 0) ||
+ (strcasecmp(media_data_name, "encv") == 0))
+ {
+ // note encv might needs it's own field eventually.
+ type = MP4GetTrackEsdsObjectTypeId(mp4File, trackId);
+ if (type == MP4_MPEG4_VIDEO_TYPE)
+ {
+ type = MP4GetVideoProfileLevel(mp4File, trackId);
+ typeName = Mpeg4VisualProfileName(type);
+ if (typeName == NULL)
+ {
+ typeName = "MPEG-4 Unknown Profile";
+ }
+ else
+ {
+ foundTypeName = true;
+ }
+ }
+ else
+ {
+ for (u_int8_t i = 0; i < numMpegVideoTypes; i++)
+ {
+ if (type == mpegVideoTypes[i])
+ {
+ typeName = mpegVideoNames[i];
+ foundTypeName = true;
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ typeName = media_data_name;
+ foundTypeName = true; // we don't have a type value to display
+ }
+
+ MP4Duration trackDuration =
+ MP4GetTrackDuration(mp4File, trackId);
+
+ double msDuration =
+ UINT64_TO_DOUBLE(MP4ConvertFromTrackDuration(mp4File, trackId,
+ trackDuration, MP4_MSECS_TIME_SCALE));
+
+
+ // Note not all mp4 implementations set width and height correctly
+ // The real answer can be buried inside the ES configuration info
+ u_int16_t width = MP4GetTrackVideoWidth(mp4File, trackId);
+
+ u_int16_t height = MP4GetTrackVideoHeight(mp4File, trackId);
+
+ double fps = MP4GetTrackVideoFrameRate(mp4File, trackId);
+
+ char *sInfo = (char*)MP4Malloc(256);
+
+ // type duration avgBitrate frameSize frameRate
+ if (foundTypeName)
+ {
+ sprintf(sInfo,
+ "%s",
+ typeName);
+ }
+ else
+ {
+ sprintf(sInfo,
+ "%s(%u)",
+ typeName,
+ type);
+ }
+
+ return sInfo;
+}
+static char* PrintCntlInfo(
+ MP4FileHandle mp4File,
+ MP4TrackId trackId)
+{
+ const char *media_data_name = MP4GetTrackMediaDataName(mp4File, trackId);
+ const char *typeName = "Unknown";
+
+ if (media_data_name == NULL)
+ {
+ typeName = "Unknown - no media data name";
+ }
+ else if (strcasecmp(media_data_name, "href") == 0)
+ {
+ typeName = "ISMA Href";
+ }
+ else
+ {
+ typeName = media_data_name;
+ }
+
+ MP4Duration trackDuration =
+ MP4GetTrackDuration(mp4File, trackId);
+
+ double msDuration =
+ UINT64_TO_DOUBLE(MP4ConvertFromTrackDuration(mp4File, trackId,
+ trackDuration, MP4_MSECS_TIME_SCALE));
+ char *sInfo = (char *)MP4Malloc(256);
+
+ snprintf(sInfo, 256,
+ "%u\tcontrol\t%s, %.3f secs\r\n",
+ trackId,
+ typeName,
+ msDuration / 1000.0);
+ return sInfo;
+}
+
+
+static char* PrintHintInfo(
+ MP4FileHandle mp4File,
+ MP4TrackId trackId)
+{
+ MP4TrackId referenceTrackId =
+ MP4GetHintTrackReferenceTrackId(mp4File, trackId);
+
+ char* payloadName = NULL;
+ if (!MP4GetHintTrackRtpPayload(mp4File, trackId, &payloadName))
+ return NULL;
+
+ char *sInfo = (char*)MP4Malloc(256);
+
+ snprintf(sInfo, 256,
+ "%u\thint\tPayload %s for track %u\r\n",
+ trackId,
+ payloadName,
+ referenceTrackId);
+
+ free(payloadName);
+
+ return sInfo;
+}
+#if 0
+static char* PrintTrackInfo(
+ MP4FileHandle mp4File,
+ MP4TrackId trackId)
+{
+ char* trackInfo = NULL;
+
+ const char* trackType =
+ MP4GetTrackType(mp4File, trackId);
+ if (trackType == NULL) return NULL;
+
+ if (!strcmp(trackType, MP4_AUDIO_TRACK_TYPE))
+ {
+ trackInfo = PrintAudioInfo(mp4File, trackId);
+ }
+ else if (!strcmp(trackType, MP4_VIDEO_TRACK_TYPE))
+ {
+ trackInfo = PrintVideoInfo(mp4File, trackId);
+ }
+ else if (!strcmp(trackType, MP4_HINT_TRACK_TYPE))
+ {
+ trackInfo = PrintHintInfo(mp4File, trackId);
+ }
+ else if (strcmp(trackType, MP4_CNTL_TRACK_TYPE) == 0)
+ {
+ trackInfo = PrintCntlInfo(mp4File, trackId);
+ }
+ else
+ {
+ trackInfo = (char*)MP4Malloc(256);
+ if (!strcmp(trackType, MP4_OD_TRACK_TYPE))
+ {
+ snprintf(trackInfo, 256,
+ "%u\tod\tObject Descriptors\r\n",
+ trackId);
+ }
+ else if (!strcmp(trackType, MP4_SCENE_TRACK_TYPE))
+ {
+ snprintf(trackInfo, 256,
+ "%u\tscene\tBIFS\r\n",
+ trackId);
+ }
+ else
+ {
+ snprintf(trackInfo, 256,
+ "%u\t%s\r\n",
+ trackId, trackType);
+ }
+ }
+
+ return trackInfo;
+}
+
+extern "C" char* MP4Info(
+ MP4FileHandle mp4File,
+ MP4TrackId trackId)
+{
+ char* info = NULL;
+
+ if (MP4_IS_VALID_FILE_HANDLE(mp4File))
+ {
+ try
+ {
+ if (trackId == MP4_INVALID_TRACK_ID)
+ {
+ uint buflen = 4 * 1024;
+ info = (char*)MP4Calloc(buflen);
+
+ buflen -= snprintf(info, buflen,
+ "Track\tType\tInfo\r\n");
+
+ u_int32_t numTracks = MP4GetNumberOfTracks(mp4File);
+
+ for (u_int32_t i = 0; i < numTracks; i++)
+ {
+ trackId = MP4FindTrackId(mp4File, i);
+ char* trackInfo = PrintTrackInfo(mp4File, trackId);
+ strncat(info, trackInfo, buflen);
+ uint newlen = strlen(trackInfo);
+ if (newlen > buflen) buflen = 0;
+ else buflen -= newlen;
+ MP4Free(trackInfo);
+ }
+ }
+ else
+ {
+ info = PrintTrackInfo(mp4File, trackId);
+ }
+ }
+ catch (MP4Error* e)
+ {
+ delete e;
+ }
+ }
+
+ return info;
+}
+
+extern "C" char* MP4FileInfo(
+ const MP4_FILENAME_CHAR* fileName,
+ MP4TrackId trackId)
+{
+ MP4FileHandle mp4File =
+ MP4Read(fileName);
+
+ if (!mp4File)
+ {
+ return NULL;
+ }
+
+ char* info = MP4Info(mp4File, trackId);
+
+ MP4Close(mp4File);
+
+ return info; // caller should free this
+}
+
+#endif \ No newline at end of file