/* GStreamer H.263 Parser * Copyright (C) <2010> Arun Raghavan * Copyright (C) <2010> Edward Hervey * Copyright (C) <2010> Collabora Multimedia * Copyright (C) <2010> Nokia Corporation * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gsth263parse.h" GST_DEBUG_CATEGORY_EXTERN (h263_parse_debug); #define GST_CAT_DEFAULT h263_parse_debug gboolean gst_h263_parse_is_delta_unit (const H263Params * params) { return (params->type == PICTURE_I); } /* Reads adapter and tries to populate params. 'fast' mode can be used to * extract a subset of the data (for now, it quits once we have the picture * type. */ GstFlowReturn gst_h263_parse_get_params (H263Params * params, GstBuffer * buffer, gboolean fast, H263ParseState * state) { static const guint8 partable[6][2] = { {1, 0}, {1, 1}, {12, 11}, {10, 11}, {16, 11}, {40, 33} }; static const guint16 sizetable[8][2] = { {0, 0}, {128, 96}, {176, 144}, {352, 288}, {704, 576}, {1408, 1152} }; #ifndef GST_DISABLE_GST_DEBUG static const gchar *source_format_name[] = { "Forbidden", "sub-QCIF", "QCIF", "CIF", "4CIF", "16CIF", "Reserved", "Extended PType" }; #endif GstBitReader br; GstMapInfo map; guint8 tr; guint32 psc = 0, temp32; guint8 temp8, pquant; gboolean hasplusptype; gst_buffer_map (buffer, &map, GST_MAP_READ); /* FIXME: we can optimise a little by checking the value of available * instead of calling using the bit reader's get_bits_* functions. */ gst_bit_reader_init (&br, map.data, map.size); /* Default PCF is CIF PCF = 30000/1001 */ params->pcfnum = 30000; params->pcfdenom = 1001; GST_DEBUG ("NEW BUFFER"); if (!gst_bit_reader_get_bits_uint32 (&br, &psc, 22) || !gst_bit_reader_get_bits_uint8 (&br, &tr, 8) || !gst_bit_reader_get_bits_uint8 (&br, &temp8, 8)) goto more; /* PSC : Picture Start Code 22 bits * TR : Temporal Reference 8 bits * PTYPE : Type Information variable * bit 1 : Always "1" * bit 2 : Always "0" * bit 3 : Split Screen Indicator * bit 4 : Document Camera Indicator * bit 6-8 : Source Format * if 111 : extended PTYPE is present */ /* 5.1.1 PSC : Picture Start Code (0x0020) 22 bits */ /* FIXME : Scan for the PSC instead of assuming it's always present * and at the beginning. */ if (G_UNLIKELY (psc != 0x0020)) { GST_WARNING ("Invalid PSC"); goto beach; } /* 5.1.2 TR : Temporal Reference 8 bits */ GST_DEBUG (" Temporal Reference : %d", tr); params->temporal_ref = tr; if ((temp8 >> 6) != 0x2) { GST_WARNING ("Invalid PTYPE"); goto beach; } /* 5.1.3 PTYPE : Type Information variable length */ params->splitscreen = (temp8 & 0x20) == 0x20; params->documentcamera = (temp8 & 0x10) == 0x10; params->fullpicturefreezerelease = (temp8 & 0x08) == 0x08; params->format = temp8 & 0x07; hasplusptype = (temp8 & 0x07) == 0x07; GST_DEBUG (" Split Screen Indicator : %s", params->splitscreen ? "on" : "off"); GST_DEBUG (" Document camera indicator : %s", params->documentcamera ? "on" : "off"); GST_DEBUG (" Full Picture Freeze Release : %s", params->fullpicturefreezerelease ? "on" : "off"); GST_DEBUG (" Source format 0x%x (%s)", params->format, source_format_name[params->format]); if (!hasplusptype) { guint8 ptype2; /* Fill in width/height based on format */ params->width = sizetable[params->format][0]; params->height = sizetable[params->format][1]; GST_DEBUG (" Picture width x height: %d x %d", params->width, params->height); /* Default PAR is 12/11 */ params->parnum = 12; params->pardenom = 11; /* 5.1.3 : Remainder of PTYPE 5 bits */ if (!gst_bit_reader_get_bits_uint8 (&br, &ptype2, 5)) goto more; params->type = (ptype2 & 0x10) == 0x10; if ((ptype2 & 0x08) == 0x08) params->features |= H263_OPTION_UMV_MODE; if ((ptype2 & 0x04) == 0x04) params->features |= H263_OPTION_SAC_MODE; if ((ptype2 & 0x02) == 0x02) params->features |= H263_OPTION_AP_MODE; if ((ptype2 & 0x01) == 0x01) { params->features |= H263_OPTION_PB_MODE; params->type = PICTURE_PB; } GST_DEBUG (" Picture Coding Type : %s", (ptype2 & 0x10) == 0x10 ? "INTER (P-picture)" : "INTRA (I-picture)"); GST_DEBUG (" Unrestricted Motion Vector mode (Annex D) : %s", (ptype2 & 0x08) == 0x08 ? "on" : "off"); GST_DEBUG (" Syntax-basex Arithmetic Coding mode (Annex E) : %s", (ptype2 & 0x04) == 0x04 ? "on" : "off"); GST_DEBUG (" Advanced Prediction mode (Annex F) : %s", (ptype2 & 0x02) == 0x02 ? "on" : "off"); GST_DEBUG (" PB Frames mode (Annex G) : %s", (ptype2 & 0x01) == 0x01 ? "on" : "off"); if (fast) goto done; } if (hasplusptype) { guint8 ufep; guint8 cpm; guint32 opptype = 0, mpptype = 0; /* 5.1.4 PLUSPTYPE */ /* 5.1.4.1 UFEP : Update Full Extended PTYPE (3 bits) */ if (!gst_bit_reader_get_bits_uint8 (&br, &ufep, 3)) goto more; GST_DEBUG (" UFEP 0x%x", ufep); if (ufep == 1) { /* 5.1.4.2 OPPTYPE : The Optional Part of PLUSPTYPE (OPPTYPE) (18 bits) */ if (!gst_bit_reader_get_bits_uint32 (&br, &opptype, 18)) goto more; /* Last 4 bits are always "1000" */ if ((opptype & 0xf) != 0x8) { GST_WARNING ("Corrupted OPTTYPE"); goto beach; } params->format = opptype >> 15; params->custompcfpresent = (opptype & 0x4000) == 0x4000; if (opptype & 0x2000) params->features |= H263_OPTION_UMV_MODE; if (opptype & 0x1000) params->features |= H263_OPTION_SAC_MODE; if (opptype & 0x0800) params->features |= H263_OPTION_AP_MODE; if (opptype & 0x0400) params->features |= H263_OPTION_AIC_MODE; if (opptype & 0x0200) params->features |= H263_OPTION_DF_MODE; if (opptype & 0x0100) params->features |= H263_OPTION_SS_MODE; if (opptype & 0x0080) params->features |= H263_OPTION_RPS_MODE; if (opptype & 0x0040) params->features |= H263_OPTION_ISD_MODE; if (opptype & 0x0020) params->features |= H263_OPTION_AIV_MODE; if (opptype & 0x0010) params->features |= H263_OPTION_MQ_MODE; /* Bit 15 is set to 1 to avoid looking like a start code */ if (opptype & 0x0004) params->features |= H263_OPTION_ERPS_MODE; if (opptype & 0x0002) params->features |= H263_OPTION_DPS_MODE; } /* 5.1.4.3 MPPTYPE : The mandatory part of PLUSPTYPE (9 bits) */ if (!gst_bit_reader_get_bits_uint32 (&br, &mpptype, 9)) goto more; /* Last 3 bits are always "001" */ if ((mpptype & 0x7) != 1) { GST_WARNING ("Corrupted MPPTYPE"); goto beach; } params->type = mpptype >> 6; GST_DEBUG (" Picture Coding Type : %d", params->type); if (fast) goto done; if (mpptype & 0x2000) params->features |= H263_OPTION_RPR_MODE; if (mpptype & 0x1000) params->features |= H263_OPTION_RRU_MODE; /* 5.1.20 CPM : Continuous Presence Multipoint and Video Multiplex (1 bit) */ if (!gst_bit_reader_get_bits_uint8 (&br, &cpm, 1)) goto more; GST_DEBUG (" Continuous Presence Multipoint and Video Multiplex : %d", cpm); if (cpm) { /* 5.1.21 PSBI : Picture Sub-Bitstream Indicator (2 bits) */ guint8 psbi; if (!gst_bit_reader_get_bits_uint8 (&br, &psbi, 2)) goto more; GST_DEBUG (" Picture Sub-Bitstream Indicator (PSBI):%d", psbi); } if (ufep == 1) { if (params->format == 6) { /* A fixed length codeword of 23 bits that is present only if the use of * a custom picture format is signalled in PLUSPTYPE and UFEP is 001 */ guint32 cpfmt = 0; /* 5.1.5 CPFMT : Custom Picture Format (23 bits) */ if (!gst_bit_reader_get_bits_uint32 (&br, &cpfmt, 23)) goto more; if (!(cpfmt & 0x200)) { GST_WARNING ("Corrupted CPFMT (0x%x)", cpfmt); goto beach; } temp8 = cpfmt >> 19; /* Bits 5-13: Picture Width Indication: Range [0, ... , 511]; * Number of pixels per line = (PWI + 1) * 4 */ params->width = (((cpfmt >> 10) & 0x1ff) + 1) * 4; /* Bits 15-23 Picture Height Indication: Range [1, ... , 288]; * Number of lines = PHI * 4 */ params->height = (cpfmt & 0x1ff) * 4; if (temp8 == 0xf) { guint32 epar = 0; /* 5.1.6 EPAR : Extended Pixel Aspect Ratio (16bits) */ if (!gst_bit_reader_get_bits_uint32 (&br, &epar, 16)) goto more; params->parnum = epar >> 8; params->pardenom = epar & 0xf; } else { params->parnum = partable[temp8][0]; params->pardenom = partable[temp8][1]; } } else { /* Fill in width/height based on format */ params->width = sizetable[params->format][0]; params->height = sizetable[params->format][1]; GST_DEBUG (" Picture width x height: %d x %d", params->width, params->height); /* Fill in default Pixel aspect ratios */ params->parnum = 12; params->pardenom = 11; } if (params->custompcfpresent) { /* 5.1.7 CPCFC : Custom Picture Clock Frequency Code (8bits) */ /* (we store this as a frame rate) */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 8)) goto more; GST_DEBUG (" Custom PCF is present (%d)", (int) temp8); params->pcfnum = gst_util_uint64_scale_int (1800000, 1, temp8 & 0x7f); params->pcfdenom = (temp8 & 0x80) ? 1001 : 1000; /* 5.1.8 ETR : Extended Temp8oral Reference (2bits) */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 2)) goto more; params->temporal_ref |= temp8 << 8; } if (params->features & H263_OPTION_UMV_MODE) { guint8 i; /* 5.1.9 UUI : Unlimited Unrestricted Motion Vectors Indicator (variable length) */ if (!gst_bit_reader_get_bits_uint8 (&br, &i, 1)) goto more; if (i == 0) { if (!gst_bit_reader_get_bits_uint8 (&br, &i, 1)) goto more; if (i != 1) { GST_WARNING ("Corrupted UUI (0%u)", (guint) i); goto beach; } params->uui = UUI_IS_01; } else { params->uui = UUI_IS_1; } } if (params->features & H263_OPTION_SS_MODE) { /* 5.1.10 SSS : Slice Structured Submode bits (2bits) */ if (!gst_bit_reader_get_bits_uint8 (&br, ¶ms->sss, 2)) goto more; } /* WE DO NOT SUPPORT optional Temporal, SNR, and Spatial Scalability mode */ /* 5.1.11 ELNUM : Enhancement Layer Number (4bits) */ /* 5.1.12 RLNUM : Reference Layer Number (4bits) */ if (params->features & H263_OPTION_RPS_MODE) { /* 5.1.13 RPSMF : Reference Picture Selection Mode Flags (3bits) */ /* FIXME : We just swallow the bits */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 3)) goto more; /* 5.1.14 TRPI : Temporal Reference for Prediction Indication (1bit) */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 1)) goto more; if (temp8) { /* 5.1.15 TRP : Temporal Reference for Prediction (10bits) */ /* FIXME : We just swallow the bits */ if (!gst_bit_reader_get_bits_uint32 (&br, &temp32, 10)) goto more; } /* 5.1.16 BCI Back-Channel message Indication (variable length) */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 1)) goto more; if (temp8 == 1) { /* 5.1.17 BCM Back-Channel Message (variable length) */ GST_ERROR ("We won't support Back-Channel Message (BCM)"); goto beach; } else { if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 1)) goto more; if (temp8 != 1) { GST_WARNING ("Corrupted BCI"); goto beach; } } } /* END H263_OPTION_RPS_MODE */ } GST_DEBUG (" Unrestricted Motion Vector mode (Annex D) : %s", (params->features & H263_OPTION_UMV_MODE) ? "on" : "off"); GST_DEBUG (" Syntax-basex Arithmetic Coding mode (Annex E) : %s", (params->features & H263_OPTION_SAC_MODE) ? "on" : "off"); GST_DEBUG (" Advanced Prediction mode (Annex F) : %s", (params->features & H263_OPTION_AP_MODE) ? "on" : "off"); GST_DEBUG (" Advanced INTRA Coding mode (Annex I) : %s", (params->features & H263_OPTION_AIC_MODE ? "on" : "off")); GST_DEBUG (" Deblocking Filter mode (Annex J) : %s", (params->features & H263_OPTION_DF_MODE ? "on" : "off")); GST_DEBUG (" Slice Structured mode (Annex K) : %s", (params->features & H263_OPTION_SS_MODE ? "on" : "off")); GST_DEBUG (" Reference Picture Selection mode (Annex N) : %s", (params->features & H263_OPTION_RPS_MODE ? "on" : "off")); GST_DEBUG (" Independent Segment Decoding mode (Annex R) : %s", (params->features & H263_OPTION_ISD_MODE ? "on" : "off")); GST_DEBUG (" Alternative INTER VLC mode (Annex S) : %s", (params->features & H263_OPTION_AIV_MODE ? "on" : "off")); GST_DEBUG (" Modified Quantization mode (Annex T) : %s", (params->features & H263_OPTION_MQ_MODE ? "on" : "off")); GST_DEBUG (" Enhanced Reference Picture Selection mode (Annex U) : %s", (params->features & H263_OPTION_ERPS_MODE ? "on" : "off")); GST_DEBUG (" Enhanced Data Partitioned Slices mode (Annex V) : %s", (params->features & H263_OPTION_DPS_MODE ? "on" : "off")); /* END ufep == 1 */ /* WE DO NOT SUPPORT optional Reference Picture Resampling mode */ /* 5.1.18 RPRP : Reference Picture Resampling Parameters (variable length) */ } /* END hasplusptype */ /* 5.1.19 PQUANT : Quantizer Information (5 bits) */ if (!gst_bit_reader_get_bits_uint8 (&br, &pquant, 5)) goto more; GST_DEBUG (" PQUANT : 0x%x", pquant); if (!hasplusptype) { guint8 cpm; /* 5.1.20 CPM : Continuous Presence Multipoint and Video Multiplex (1 bit) */ if (!gst_bit_reader_get_bits_uint8 (&br, &cpm, 1)) goto more; GST_DEBUG (" Continuous Presence Multipoint and Video Multiplex : %d", cpm); if (cpm) { /* 5.1.21 PSBI : Picture Sub-Bitstream Indicator (2 bits) */ guint8 psbi; if (!gst_bit_reader_get_bits_uint8 (&br, &psbi, 2)) goto more; GST_DEBUG (" Picture Sub-Bitstream Indicator (PSBI):%d", psbi); } } if (params->type & (PICTURE_PB | PICTURE_IMPROVED_PB)) { /* 5.1.22 TRb : Temporal Reference for B-pictures in PB-frames (3/5bits) */ /* FIXME : We just swallow the bits */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, params->custompcfpresent ? 5 : 3)) goto more; /* 5.1.23 DBQUANT : Quantization information for B-pictures in PB-frames (2bits) */ if (!gst_bit_reader_get_bits_uint8 (&br, &temp8, 2)) goto more; } GST_DEBUG (" Framerate defined by the stream is %d/%d", params->pcfnum, params->pcfdenom); /* We ignore the PEI and PSUPP - these may occur in any frame, and can be * ignored by decoders that don't support them, except for bits of Annex W */ /* FIXME: Annex H (Forward Error Correction) requires that we poke into the * stream data. */ /* FIXME: Annex P (Reference Picture Resampling) can be signaled implicitly * as well as in the header. Should we set the field to false in caps if it * is not specfied by the header? */ /* FIXME: Annex U (Enhanced Reference Picture Selection) poses a problem - we * have no means of specifying what sub-modes, if any, are used. */ done: *state = GOT_HEADER; more: gst_buffer_unmap (buffer, &map); return GST_FLOW_OK; beach: *state = PASSTHROUGH; gst_buffer_unmap (buffer, &map); return GST_FLOW_OK; } gint gst_h263_parse_get_profile (const H263Params * params) { gboolean c, d, d1, d21, e, f, f2, g, h, i, j, k, k0, k1, l, m, n, o, p, q, r, s, t, u, v, w; /* FIXME: some parts of Annex C can be discovered, others can not */ c = FALSE; d = (params->features & H263_OPTION_UMV_MODE) != 0; /* d1: Annex D.1; d21: Annex D.2 with UUI=1; d22: Annex D.2 with UUI=01 */ d1 = (d && params->uui == UUI_ABSENT); d21 = (d && params->uui == UUI_IS_1); /* d22 = (d && params->uui == UUI_IS_01); */ e = (params->features & H263_OPTION_SAC_MODE) != 0; /* f:Annex F.2 or F.3 may be used; f2: only Annex F.2 is used (we have no * way of detecting this right now */ f = (params->features & H263_OPTION_AP_MODE) != 0; f2 = FALSE; g = (params->features & H263_OPTION_PB_MODE) != 0; h = FALSE; i = (params->features & H263_OPTION_AIC_MODE) != 0; j = (params->features & H263_OPTION_DF_MODE) != 0; k = (params->features & H263_OPTION_SS_MODE) != 0; /* k0: Annex K without submodes; k1: Annex K with ASO; k2: Annex K with RS */ k0 = (k && params->sss == 0x0); k1 = (k && params->sss == 0x2); /* k2 = (k && params->sss == 0x1); */ l = FALSE; m = (params->type == PICTURE_IMPROVED_PB); n = (params->features & H263_OPTION_RPS_MODE) != 0; o = FALSE; p = FALSE; q = (params->features & H263_OPTION_RRU_MODE) != 0; r = (params->features & H263_OPTION_ISD_MODE) != 0; s = (params->features & H263_OPTION_AIV_MODE) != 0; t = (params->features & H263_OPTION_MQ_MODE) != 0; u = (params->features & H263_OPTION_ERPS_MODE) != 0; v = (params->features & H263_OPTION_DPS_MODE) != 0; w = FALSE; /* FIXME: The use of UUI in Annex D seems to be in contradiction with the * profile definition in Annex X. Afaict, D.2 with UUI not present is not a * meaningful state. */ /* FIXME: We have no way to distinguish between the use of section F.2 (four * motion vectors per macroblock) and F.3 (overlapped block motion * compensation), so we assume that they are either both present else neither * is. This means if a profile supports only F.2 and not F.3, but we see that * Advanced Prediction mode (Annex F) is used, we assume this profile does * not apply. */ /* FIXME: We assume there is no error correction (Annex H) to avoid having to * parse the stream to look for its existence. */ /* FIXME: Profiles 1 and 5-8 need the detection of Annex L.4 which can happen * anywhere in the stream, so we just assume it doesn't exist and hope for * the best. */ /* FIXME: Annex O support is TBD. */ /* FIXME: see note for Annex P elsewhere in this file. */ /* FIXME: Annex W.6.3.{8,11} suffer the same fate as Annex L.4 above. */ /* FIXME: We have no way of figuring out submodes when Annex U is used. Here * we always assume no submode is used. */ if (!c && !d && !e && !f && !g && !h && !i && !j && !k && !l && !m && !n && !o && !p && !q && !r && !s && !t && !u && !v && !w) return 0; if (!c && (!d || d1) && !e && (!f || f2) && !g && !h && !k && !l && !m && !n && !o && !p && !q && !r && !s && !u && !v && !w) return 1; if (!c && (!d || d1) && !e && !g && !h && !i && !j && !k && !l && !m && !n && !o && !p && !q && !r && !s && !t && !u && !v && !w) return 2; if (!c && (!d || d1) && !e && (!f || f2) && !g && !h && (!k || k0) && !l && !m && !n && !o && !p && !q && !r && !s && !u && !v && !w) return 3; if (!c && (!d || d1) && !e && (!f || f2) && !g && !h && (!k || k0) && !l && !m && !n && !o && !p && !q && !r && !s && !u && !w) return 4; if (!c && (!d || d1 || d21) && !e && !g && !h && !k && !l && !m && !n && !o && !p && !q && !r && !s && !v && !w) return 5; if (!c && (!d || d1 || d21) && !e && !g && !h && (!k || k0 || k1) && !l && !m && !n && !o && !p && !q && !r && !s && !v && !w) return 6; if (!c && (!d || d1 || d21) && !e && !g && !h && !k && !l && !m && !n && !o && !p && !q && !r && !s && !v && !w) return 7; if (!c && (!d || d1 || d21) && !e && !g && !h && (!k || k0 || k1) && !l && !m && !n && !o && !p && !q && !r && !s && !v && !w) /* FIXME: needs Annex O and Annex P support */ return 8; return -1; } #define H263_PROFILE_NOT_0_2(profile) \ ((profile) != -1 && (profile) != 0 && (profile) != 2) #define H263_FMT_UPTO_QCIF(params) \ ((params)->format == PICTURE_FMT_SUB_QCIF || \ (params)->format == PICTURE_FMT_QCIF) #define H263_FMT_UPTO_CIF(params) \ ((params)->format == PICTURE_FMT_SUB_QCIF || \ (params)->format == PICTURE_FMT_QCIF || \ (params)->format == PICTURE_FMT_CIF) #define H263_FMT_CUSTOM_UPTO_QCIF(params) \ ((params)->format == PICTURE_FMT_RESERVED1 && \ (params)->height <= 144 && \ (params)->width <= 176) #define H263_FMT_CUSTOM_UPTO_CIF(params) \ ((params)->format == PICTURE_FMT_RESERVED1 && \ (params)->height <= 288 && \ (params)->width <= 352) #define GST_FRACTION_LE(f1, f2) \ ((gst_value_compare (&(f1), &(f2)) == GST_VALUE_LESS_THAN) || \ (gst_value_compare (&(f1), &(f2)) == GST_VALUE_EQUAL)) gint gst_h263_parse_get_level (const H263Params * params, gint profile, guint bitrate, gint fps_num, gint fps_denom) { GValue fps15 = { 0, }; GValue fps30 = { 0, }; GValue fps50 = { 0, }; GValue fps60 = { 0, }; GValue fps = { 0, }; if (bitrate == 0) { GST_DEBUG ("Can't calculate level since bitrate is unknown"); return -1; } g_value_init (&fps15, GST_TYPE_FRACTION); g_value_init (&fps30, GST_TYPE_FRACTION); g_value_init (&fps50, GST_TYPE_FRACTION); g_value_init (&fps60, GST_TYPE_FRACTION); g_value_init (&fps, GST_TYPE_FRACTION); gst_value_set_fraction (&fps15, 15000, 1001); gst_value_set_fraction (&fps30, 30000, 1001); gst_value_set_fraction (&fps50, 50, 1); gst_value_set_fraction (&fps60, 60000, 1001); gst_value_set_fraction (&fps, fps_num, fps_denom); /* Level 10 */ if (H263_FMT_UPTO_QCIF (params) && GST_FRACTION_LE (fps, fps15) && bitrate <= 64000) return 10; /* Level 20 */ if (((H263_FMT_UPTO_QCIF (params) && GST_FRACTION_LE (fps, fps30)) || (params->format == PICTURE_FMT_CIF && GST_FRACTION_LE (fps, fps15))) && bitrate <= 128000) return 20; /* Level 30 */ if (H263_FMT_UPTO_CIF (params) && GST_FRACTION_LE (fps, fps30) && bitrate <= 384000) return 30; /* Level 40 */ if (H263_FMT_UPTO_CIF (params) && GST_FRACTION_LE (fps, fps30) && bitrate <= 2048000) return 40; /* Level 45 */ if ((H263_FMT_UPTO_QCIF (params) || (H263_FMT_CUSTOM_UPTO_QCIF (params) && H263_PROFILE_NOT_0_2 (profile))) && GST_FRACTION_LE (fps, fps15) && /* (!h263parse->custompcfpresent || H263_PROFILE_NOT_0_2(profile)) && */ bitrate <= 128000) return 45; /* Level 50 */ if ((H263_FMT_UPTO_CIF (params) || H263_FMT_CUSTOM_UPTO_CIF (params)) && (GST_FRACTION_LE (fps, fps50) || (params->width <= 352 && params->height <= 240 && GST_FRACTION_LE (fps, fps60))) && (bitrate <= 4096000)) return 50; /* Level 60 */ if (((params->width <= 720 && params->height <= 288 && GST_FRACTION_LE (fps, fps50)) || (params->width <= 720 && params->height <= 240 && GST_FRACTION_LE (fps, fps60))) && (bitrate <= 8192000)) return 60; /* Level 70 */ if (((params->width <= 720 && params->height <= 576 && GST_FRACTION_LE (fps, fps50)) || (params->width <= 720 && params->height <= 480 && GST_FRACTION_LE (fps, fps60))) && (bitrate <= 16384000)) return 70; GST_DEBUG ("Weird - didn't match any profile!"); return -1; } void gst_h263_parse_get_framerate (const H263Params * params, gint * num, gint * denom) { *num = params->pcfnum; *denom = params->pcfdenom; } void gst_h263_parse_get_par (const H263Params * params, gint * num, gint * denom) { *num = params->parnum; *denom = params->pardenom; }