diff options
author | Anton Khirnov <anton@khirnov.net> | 2014-05-03 11:04:50 +0200 |
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committer | Anton Khirnov <anton@khirnov.net> | 2014-05-18 10:21:31 +0200 |
commit | e4dc1000d7bbbcb5b45cf9849fc5315f19578e37 (patch) | |
tree | 8617f3bbc0d357c298d0fadd8c86ce2edc298e81 /libavformat/yuv4mpeg.c | |
parent | 3ef6c5264b2590781b4ed556443ff49709dd45fb (diff) |
yuv4mpeg: split the demuxer and muxer into separate files
Diffstat (limited to 'libavformat/yuv4mpeg.c')
-rw-r--r-- | libavformat/yuv4mpeg.c | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c deleted file mode 100644 index f793a0e170..0000000000 --- a/libavformat/yuv4mpeg.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * YUV4MPEG format - * Copyright (c) 2001, 2002, 2003 Fabrice Bellard - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/pixdesc.h" -#include "avformat.h" -#include "internal.h" - -#define Y4M_MAGIC "YUV4MPEG2" -#define Y4M_FRAME_MAGIC "FRAME" -#define Y4M_LINE_MAX 256 - -struct frame_attributes { - int interlaced_frame; - int top_field_first; -}; - -#if CONFIG_YUV4MPEGPIPE_MUXER -static int yuv4_generate_header(AVFormatContext *s, char* buf) -{ - AVStream *st; - int width, height; - int raten, rated, aspectn, aspectd, n; - char inter; - const char *colorspace = ""; - - st = s->streams[0]; - width = st->codec->width; - height = st->codec->height; - - av_reduce(&raten, &rated, st->codec->time_base.den, - st->codec->time_base.num, (1UL << 31) - 1); - - aspectn = st->sample_aspect_ratio.num; - aspectd = st->sample_aspect_ratio.den; - - if (aspectn == 0 && aspectd == 1) - aspectd = 0; // 0:0 means unknown - - inter = 'p'; /* progressive is the default */ - if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame) - inter = st->codec->coded_frame->top_field_first ? 't' : 'b'; - - switch (st->codec->pix_fmt) { - case AV_PIX_FMT_GRAY8: - colorspace = " Cmono"; - break; - case AV_PIX_FMT_YUV411P: - colorspace = " C411 XYSCSS=411"; - break; - case AV_PIX_FMT_YUV420P: - switch (st->codec->chroma_sample_location) { - case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break; - case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break; - default: colorspace = " C420jpeg XYSCSS=420JPEG"; break; - } - break; - case AV_PIX_FMT_YUV422P: - colorspace = " C422 XYSCSS=422"; - break; - case AV_PIX_FMT_YUV444P: - colorspace = " C444 XYSCSS=444"; - break; - } - - /* construct stream header, if this is the first frame */ - n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n", - Y4M_MAGIC, width, height, raten, rated, inter, - aspectn, aspectd, colorspace); - - return n; -} - -static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVStream *st = s->streams[pkt->stream_index]; - AVIOContext *pb = s->pb; - AVPicture *picture; - int* first_pkt = s->priv_data; - int width, height, h_chroma_shift, v_chroma_shift; - int i; - char buf2[Y4M_LINE_MAX + 1]; - char buf1[20]; - uint8_t *ptr, *ptr1, *ptr2; - - picture = (AVPicture *)pkt->data; - - /* for the first packet we have to output the header as well */ - if (*first_pkt) { - *first_pkt = 0; - if (yuv4_generate_header(s, buf2) < 0) { - av_log(s, AV_LOG_ERROR, - "Error. YUV4MPEG stream header write failed.\n"); - return AVERROR(EIO); - } else { - avio_write(pb, buf2, strlen(buf2)); - } - } - - /* construct frame header */ - - snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC); - avio_write(pb, buf1, strlen(buf1)); - - width = st->codec->width; - height = st->codec->height; - - ptr = picture->data[0]; - for (i = 0; i < height; i++) { - avio_write(pb, ptr, width); - ptr += picture->linesize[0]; - } - - if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8) { - // Adjust for smaller Cb and Cr planes - av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift, - &v_chroma_shift); - // Shift right, rounding up - width = -(-width >> h_chroma_shift); - height = -(-height >> v_chroma_shift); - - ptr1 = picture->data[1]; - ptr2 = picture->data[2]; - for (i = 0; i < height; i++) { /* Cb */ - avio_write(pb, ptr1, width); - ptr1 += picture->linesize[1]; - } - for (i = 0; i < height; i++) { /* Cr */ - avio_write(pb, ptr2, width); - ptr2 += picture->linesize[2]; - } - } - return 0; -} - -static int yuv4_write_header(AVFormatContext *s) -{ - int *first_pkt = s->priv_data; - - if (s->nb_streams != 1) - return AVERROR(EIO); - - if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) { - av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n"); - return AVERROR_INVALIDDATA; - } - - if (s->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUV411P) { - av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV " - "stream, some mjpegtools might not work.\n"); - } else if ((s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV420P) && - (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV422P) && - (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_GRAY8) && - (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV444P)) { - av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles yuv444p, " - "yuv422p, yuv420p, yuv411p and gray pixel formats. " - "Use -pix_fmt to select one.\n"); - return AVERROR(EIO); - } - - *first_pkt = 1; - return 0; -} - -AVOutputFormat ff_yuv4mpegpipe_muxer = { - .name = "yuv4mpegpipe", - .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"), - .mime_type = "", - .extensions = "y4m", - .priv_data_size = sizeof(int), - .audio_codec = AV_CODEC_ID_NONE, - .video_codec = AV_CODEC_ID_RAWVIDEO, - .write_header = yuv4_write_header, - .write_packet = yuv4_write_packet, - .flags = AVFMT_RAWPICTURE, -}; -#endif - -/* Header size increased to allow room for optional flags */ -#define MAX_YUV4_HEADER 80 -#define MAX_FRAME_HEADER 80 - -static int yuv4_read_header(AVFormatContext *s) -{ - char header[MAX_YUV4_HEADER + 10]; // Include headroom for - // the longest option - char *tokstart, *tokend, *header_end; - int i; - AVIOContext *pb = s->pb; - int width = -1, height = -1, raten = 0, - rated = 0, aspectn = 0, aspectd = 0; - enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE; - enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED; - AVStream *st; - struct frame_attributes *s1 = s->priv_data; - - for (i = 0; i < MAX_YUV4_HEADER; i++) { - header[i] = avio_r8(pb); - if (header[i] == '\n') { - header[i + 1] = 0x20; // Add a space after last option. - // Makes parsing "444" vs "444alpha" easier. - header[i + 2] = 0; - break; - } - } - if (i == MAX_YUV4_HEADER) - return -1; - if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) - return -1; - - s1->interlaced_frame = 0; - s1->top_field_first = 0; - header_end = &header[i + 1]; // Include space - for (tokstart = &header[strlen(Y4M_MAGIC) + 1]; - tokstart < header_end; tokstart++) { - if (*tokstart == 0x20) - continue; - switch (*tokstart++) { - case 'W': // Width. Required. - width = strtol(tokstart, &tokend, 10); - tokstart = tokend; - break; - case 'H': // Height. Required. - height = strtol(tokstart, &tokend, 10); - tokstart = tokend; - break; - case 'C': // Color space - if (strncmp("420jpeg", tokstart, 7) == 0) { - pix_fmt = AV_PIX_FMT_YUV420P; - chroma_sample_location = AVCHROMA_LOC_CENTER; - } else if (strncmp("420mpeg2", tokstart, 8) == 0) { - pix_fmt = AV_PIX_FMT_YUV420P; - chroma_sample_location = AVCHROMA_LOC_LEFT; - } else if (strncmp("420paldv", tokstart, 8) == 0) { - pix_fmt = AV_PIX_FMT_YUV420P; - chroma_sample_location = AVCHROMA_LOC_TOPLEFT; - } else if (strncmp("420", tokstart, 3) == 0) { - pix_fmt = AV_PIX_FMT_YUV420P; - chroma_sample_location = AVCHROMA_LOC_CENTER; - } else if (strncmp("411", tokstart, 3) == 0) - pix_fmt = AV_PIX_FMT_YUV411P; - else if (strncmp("422", tokstart, 3) == 0) - pix_fmt = AV_PIX_FMT_YUV422P; - else if (strncmp("444alpha", tokstart, 8) == 0 ) { - av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 " - "YUV4MPEG stream.\n"); - return -1; - } else if (strncmp("444", tokstart, 3) == 0) - pix_fmt = AV_PIX_FMT_YUV444P; - else if (strncmp("mono", tokstart, 4) == 0) { - pix_fmt = AV_PIX_FMT_GRAY8; - } else { - av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown " - "pixel format.\n"); - return -1; - } - while (tokstart < header_end && *tokstart != 0x20) - tokstart++; - break; - case 'I': // Interlace type - switch (*tokstart++){ - case '?': - break; - case 'p': - s1->interlaced_frame = 0; - break; - case 't': - s1->interlaced_frame = 1; - s1->top_field_first = 1; - break; - case 'b': - s1->interlaced_frame = 1; - s1->top_field_first = 0; - break; - case 'm': - av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed " - "interlaced and non-interlaced frames.\n"); - return -1; - default: - av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n"); - return -1; - } - break; - case 'F': // Frame rate - sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown - while (tokstart < header_end && *tokstart != 0x20) - tokstart++; - break; - case 'A': // Pixel aspect - sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown - while (tokstart < header_end && *tokstart != 0x20) - tokstart++; - break; - case 'X': // Vendor extensions - if (strncmp("YSCSS=", tokstart, 6) == 0) { - // Older nonstandard pixel format representation - tokstart += 6; - if (strncmp("420JPEG", tokstart, 7) == 0) - alt_pix_fmt = AV_PIX_FMT_YUV420P; - else if (strncmp("420MPEG2", tokstart, 8) == 0) - alt_pix_fmt = AV_PIX_FMT_YUV420P; - else if (strncmp("420PALDV", tokstart, 8) == 0) - alt_pix_fmt = AV_PIX_FMT_YUV420P; - else if (strncmp("411", tokstart, 3) == 0) - alt_pix_fmt = AV_PIX_FMT_YUV411P; - else if (strncmp("422", tokstart, 3) == 0) - alt_pix_fmt = AV_PIX_FMT_YUV422P; - else if (strncmp("444", tokstart, 3) == 0) - alt_pix_fmt = AV_PIX_FMT_YUV444P; - } - while (tokstart < header_end && *tokstart != 0x20) - tokstart++; - break; - } - } - - if (width == -1 || height == -1) { - av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n"); - return -1; - } - - if (pix_fmt == AV_PIX_FMT_NONE) { - if (alt_pix_fmt == AV_PIX_FMT_NONE) - pix_fmt = AV_PIX_FMT_YUV420P; - else - pix_fmt = alt_pix_fmt; - } - - if (raten <= 0 || rated <= 0) { - // Frame rate unknown - raten = 25; - rated = 1; - } - - if (aspectn == 0 && aspectd == 0) { - // Pixel aspect unknown - aspectd = 1; - } - - st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - st->codec->width = width; - st->codec->height = height; - av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1); - avpriv_set_pts_info(st, 64, rated, raten); - st->avg_frame_rate = av_inv_q(st->time_base); - st->codec->pix_fmt = pix_fmt; - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; - st->sample_aspect_ratio = (AVRational){ aspectn, aspectd }; - st->codec->chroma_sample_location = chroma_sample_location; - - return 0; -} - -static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - int i; - char header[MAX_FRAME_HEADER+1]; - int packet_size, width, height, ret; - AVStream *st = s->streams[0]; - struct frame_attributes *s1 = s->priv_data; - - for (i = 0; i < MAX_FRAME_HEADER; i++) { - header[i] = avio_r8(s->pb); - if (header[i] == '\n') { - header[i + 1] = 0; - break; - } - } - if (s->pb->error) - return s->pb->error; - else if (s->pb->eof_reached) - return AVERROR_EOF; - else if (i == MAX_FRAME_HEADER) - return AVERROR_INVALIDDATA; - - if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) - return AVERROR_INVALIDDATA; - - width = st->codec->width; - height = st->codec->height; - - packet_size = avpicture_get_size(st->codec->pix_fmt, width, height); - if (packet_size < 0) - return packet_size; - - ret = av_get_packet(s->pb, pkt, packet_size); - if (ret < 0) - return ret; - else if (ret != packet_size) - return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO); - - if (st->codec->coded_frame) { - st->codec->coded_frame->interlaced_frame = s1->interlaced_frame; - st->codec->coded_frame->top_field_first = s1->top_field_first; - } - - pkt->stream_index = 0; - return 0; -} - -static int yuv4_probe(AVProbeData *pd) -{ - /* check file header */ - if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0) - return AVPROBE_SCORE_MAX; - else - return 0; -} - -#if CONFIG_YUV4MPEGPIPE_DEMUXER -AVInputFormat ff_yuv4mpegpipe_demuxer = { - .name = "yuv4mpegpipe", - .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"), - .priv_data_size = sizeof(struct frame_attributes), - .read_probe = yuv4_probe, - .read_header = yuv4_read_header, - .read_packet = yuv4_read_packet, - .extensions = "y4m", -}; -#endif |