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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * FLV Encoding specific code. |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include "flv.h" |
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| 22 | #include "h263.h" |
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| 23 | #include "h263data.h" |
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| 24 | #include "mpegvideo.h" |
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| 25 | #include "mpegvideodata.h" |
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| 26 | |||
| 27 | void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number) |
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| 28 | { |
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| 29 | int format; |
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| 30 | |||
| 31 | avpriv_align_put_bits(&s->pb); |
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| 32 | |||
| 33 | put_bits(&s->pb, 17, 1); |
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| 34 | /* 0: h263 escape codes 1: 11-bit escape codes */ |
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| 35 | put_bits(&s->pb, 5, (s->h263_flv - 1)); |
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| 36 | put_bits(&s->pb, 8, |
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| 37 | (((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp |
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| 38 | s->avctx->time_base.den) & 0xff); /* TemporalReference */ |
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| 39 | if (s->width == 352 && s->height == 288) |
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| 40 | format = 2; |
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| 41 | else if (s->width == 176 && s->height == 144) |
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| 42 | format = 3; |
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| 43 | else if (s->width == 128 && s->height == 96) |
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| 44 | format = 4; |
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| 45 | else if (s->width == 320 && s->height == 240) |
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| 46 | format = 5; |
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| 47 | else if (s->width == 160 && s->height == 120) |
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| 48 | format = 6; |
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| 49 | else if (s->width <= 255 && s->height <= 255) |
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| 50 | format = 0; /* use 1 byte width & height */ |
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| 51 | else |
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| 52 | format = 1; /* use 2 bytes width & height */ |
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| 53 | put_bits(&s->pb, 3, format); /* PictureSize */ |
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| 54 | if (format == 0) { |
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| 55 | put_bits(&s->pb, 8, s->width); |
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| 56 | put_bits(&s->pb, 8, s->height); |
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| 57 | } else if (format == 1) { |
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| 58 | put_bits(&s->pb, 16, s->width); |
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| 59 | put_bits(&s->pb, 16, s->height); |
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| 60 | } |
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| 61 | put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */ |
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| 62 | put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */ |
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| 63 | put_bits(&s->pb, 5, s->qscale); /* Quantizer */ |
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| 64 | put_bits(&s->pb, 1, 0); /* ExtraInformation */ |
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| 65 | |||
| 66 | if (s->h263_aic) { |
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| 67 | s->y_dc_scale_table = |
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| 68 | s->c_dc_scale_table = ff_aic_dc_scale_table; |
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| 69 | } else { |
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| 70 | s->y_dc_scale_table = |
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| 71 | s->c_dc_scale_table = ff_mpeg1_dc_scale_table; |
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| 72 | } |
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| 73 | } |
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| 74 | |||
| 75 | void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level, |
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| 76 | int run, int last) |
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| 77 | { |
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| 78 | if (level < 64) { // 7-bit level |
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| 79 | put_bits(pb, 1, 0); |
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| 80 | put_bits(pb, 1, last); |
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| 81 | put_bits(pb, 6, run); |
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| 82 | |||
| 83 | put_sbits(pb, 7, slevel); |
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| 84 | } else { |
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| 85 | /* 11-bit level */ |
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| 86 | put_bits(pb, 1, 1); |
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| 87 | put_bits(pb, 1, last); |
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| 88 | put_bits(pb, 6, run); |
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| 89 | |||
| 90 | put_sbits(pb, 11, slevel); |
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| 91 | } |
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| 92 | } |
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| 93 | |||
| 94 | static const AVClass flv_class = { |
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| 95 | .class_name = "flv encoder", |
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| 96 | .item_name = av_default_item_name, |
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| 97 | .option = ff_mpv_generic_options, |
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| 98 | .version = LIBAVUTIL_VERSION_INT, |
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| 99 | }; |
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| 100 | |||
| 101 | AVCodec ff_flv_encoder = { |
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| 102 | .name = "flv", |
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| 103 | .long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"), |
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| 104 | .type = AVMEDIA_TYPE_VIDEO, |
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| 105 | .id = AV_CODEC_ID_FLV1, |
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| 106 | .priv_data_size = sizeof(MpegEncContext), |
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| 107 | .init = ff_mpv_encode_init, |
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| 108 | .encode2 = ff_mpv_encode_picture, |
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| 109 | .close = ff_mpv_encode_end, |
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| 110 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, |
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| 111 | AV_PIX_FMT_NONE}, |
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| 112 | .priv_class = &flv_class, |
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| 113 | }; |