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185 lines
5.7 KiB
185 lines
5.7 KiB
/* |
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* PNM image format |
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* Copyright (c) 2002, 2003 Fabrice Bellard |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/pixdesc.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "internal.h" |
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#include "pnm.h" |
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static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *pict, int *got_packet) |
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{ |
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PNMContext *s = avctx->priv_data; |
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AVFrame * const p = &s->picture; |
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int i, h, h1, c, n, linesize, ret; |
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uint8_t *ptr, *ptr1, *ptr2; |
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if ((ret = ff_alloc_packet(pkt, avpicture_get_size(avctx->pix_fmt, |
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avctx->width, |
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avctx->height) + 200)) < 0) { |
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
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return ret; |
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} |
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*p = *pict; |
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p->pict_type = AV_PICTURE_TYPE_I; |
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p->key_frame = 1; |
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s->bytestream_start = |
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s->bytestream = pkt->data; |
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s->bytestream_end = pkt->data + pkt->size; |
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h = avctx->height; |
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h1 = h; |
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switch (avctx->pix_fmt) { |
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case AV_PIX_FMT_MONOWHITE: |
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c = '4'; |
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n = (avctx->width + 7) >> 3; |
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break; |
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case AV_PIX_FMT_GRAY8: |
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c = '5'; |
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n = avctx->width; |
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break; |
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case AV_PIX_FMT_GRAY16BE: |
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c = '5'; |
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n = avctx->width * 2; |
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break; |
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case AV_PIX_FMT_RGB24: |
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c = '6'; |
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n = avctx->width * 3; |
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break; |
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case AV_PIX_FMT_RGB48BE: |
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c = '6'; |
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n = avctx->width * 6; |
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break; |
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case AV_PIX_FMT_YUV420P: |
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c = '5'; |
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n = avctx->width; |
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h1 = (h * 3) / 2; |
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break; |
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case AV_PIX_FMT_YUV420P16BE: |
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c = '5'; |
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n = avctx->width * 2; |
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h1 = (h * 3) / 2; |
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break; |
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default: |
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return -1; |
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} |
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snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
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"P%c\n%d %d\n", c, avctx->width, h1); |
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s->bytestream += strlen(s->bytestream); |
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if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) { |
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int maxdepth = (1 << (av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1)) - 1; |
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snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
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"%d\n", maxdepth); |
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s->bytestream += strlen(s->bytestream); |
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} |
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ptr = p->data[0]; |
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linesize = p->linesize[0]; |
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for (i = 0; i < h; i++) { |
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memcpy(s->bytestream, ptr, n); |
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s->bytestream += n; |
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ptr += linesize; |
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} |
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if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) { |
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h >>= 1; |
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n >>= 1; |
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ptr1 = p->data[1]; |
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ptr2 = p->data[2]; |
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for (i = 0; i < h; i++) { |
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memcpy(s->bytestream, ptr1, n); |
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s->bytestream += n; |
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memcpy(s->bytestream, ptr2, n); |
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s->bytestream += n; |
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ptr1 += p->linesize[1]; |
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ptr2 += p->linesize[2]; |
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} |
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} |
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pkt->size = s->bytestream - s->bytestream_start; |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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*got_packet = 1; |
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return 0; |
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} |
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#if CONFIG_PGM_ENCODER |
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AVCodec ff_pgm_encoder = { |
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.name = "pgm", |
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.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_PGM, |
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.priv_data_size = sizeof(PNMContext), |
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.init = ff_pnm_init, |
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.encode2 = pnm_encode_frame, |
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.pix_fmts = (const enum AVPixelFormat[]){ |
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE |
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}, |
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}; |
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#endif |
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#if CONFIG_PGMYUV_ENCODER |
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AVCodec ff_pgmyuv_encoder = { |
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.name = "pgmyuv", |
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.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_PGMYUV, |
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.priv_data_size = sizeof(PNMContext), |
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.init = ff_pnm_init, |
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.encode2 = pnm_encode_frame, |
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.pix_fmts = (const enum AVPixelFormat[]){ |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE |
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}, |
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}; |
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#endif |
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#if CONFIG_PPM_ENCODER |
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AVCodec ff_ppm_encoder = { |
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.name = "ppm", |
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.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_PPM, |
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.priv_data_size = sizeof(PNMContext), |
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.init = ff_pnm_init, |
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.encode2 = pnm_encode_frame, |
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.pix_fmts = (const enum AVPixelFormat[]){ |
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AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE |
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}, |
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}; |
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#endif |
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#if CONFIG_PBM_ENCODER |
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AVCodec ff_pbm_encoder = { |
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.name = "pbm", |
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.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_PBM, |
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.priv_data_size = sizeof(PNMContext), |
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.init = ff_pnm_init, |
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.encode2 = pnm_encode_frame, |
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE, |
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AV_PIX_FMT_NONE }, |
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}; |
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#endif
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