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  1. /*
  2.  * Copyright (c) 2013 Clément Bœsch
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include <quvi/quvi.h>
  22.  
  23. #include "libavformat/avformat.h"
  24. #include "libavformat/internal.h"
  25. #include "libavutil/avassert.h"
  26. #include "libavutil/opt.h"
  27.  
  28. typedef struct {
  29.     const AVClass *class;
  30.     char *format;
  31.     AVFormatContext *fmtctx;
  32. } LibQuviContext;
  33.  
  34. #define OFFSET(x) offsetof(LibQuviContext, x)
  35. #define FLAGS AV_OPT_FLAG_DECODING_PARAM
  36. static const AVOption libquvi_options[] = {
  37.     { "format", "request specific format", OFFSET(format), AV_OPT_TYPE_STRING, {.str="best"}, .flags = FLAGS },
  38.     { NULL }
  39. };
  40.  
  41. static const AVClass libquvi_context_class = {
  42.     .class_name     = "libquvi",
  43.     .item_name      = av_default_item_name,
  44.     .option         = libquvi_options,
  45.     .version        = LIBAVUTIL_VERSION_INT,
  46. };
  47.  
  48. static int libquvi_close(AVFormatContext *s)
  49. {
  50.     LibQuviContext *qc = s->priv_data;
  51.     if (qc->fmtctx)
  52.         avformat_close_input(&qc->fmtctx);
  53.     return 0;
  54. }
  55.  
  56. static int libquvi_read_header(AVFormatContext *s)
  57. {
  58.     int i, ret;
  59.     quvi_t q;
  60.     quvi_media_t m;
  61.     QUVIcode rc;
  62.     LibQuviContext *qc = s->priv_data;
  63.     char *media_url, *pagetitle;
  64.  
  65.     rc = quvi_init(&q);
  66.     if (rc != QUVI_OK) {
  67.         av_log(s, AV_LOG_ERROR, "%s\n", quvi_strerror(q, rc));
  68.         return AVERROR_EXTERNAL;
  69.     }
  70.  
  71.     quvi_setopt(q, QUVIOPT_FORMAT, qc->format);
  72.  
  73.     rc = quvi_parse(q, s->filename, &m);
  74.     if (rc != QUVI_OK) {
  75.         av_log(s, AV_LOG_ERROR, "%s\n", quvi_strerror(q, rc));
  76.         ret = AVERROR_EXTERNAL;
  77.         goto err_quvi_close;
  78.     }
  79.  
  80.     rc = quvi_getprop(m, QUVIPROP_MEDIAURL, &media_url);
  81.     if (rc != QUVI_OK) {
  82.         av_log(s, AV_LOG_ERROR, "%s\n", quvi_strerror(q, rc));
  83.         ret = AVERROR_EXTERNAL;
  84.         goto err_quvi_cleanup;
  85.     }
  86.  
  87.     if (!(qc->fmtctx = avformat_alloc_context())) {
  88.         ret = AVERROR(ENOMEM);
  89.         goto err_quvi_cleanup;
  90.     }
  91.  
  92.     if ((ret = ff_copy_whitelists(qc->fmtctx, s)) < 0) {
  93.         avformat_free_context(qc->fmtctx);
  94.         qc->fmtctx = NULL;
  95.         goto err_quvi_cleanup;
  96.     }
  97.  
  98.     ret = avformat_open_input(&qc->fmtctx, media_url, NULL, NULL);
  99.     if (ret < 0)
  100.         goto err_quvi_cleanup;
  101.  
  102.     rc = quvi_getprop(m, QUVIPROP_PAGETITLE, &pagetitle);
  103.     if (rc == QUVI_OK)
  104.         av_dict_set(&s->metadata, "title", pagetitle, 0);
  105.  
  106.     for (i = 0; i < qc->fmtctx->nb_streams; i++) {
  107.         AVStream *st = avformat_new_stream(s, NULL);
  108.         AVStream *ist = qc->fmtctx->streams[i];
  109.         if (!st) {
  110.             ret = AVERROR(ENOMEM);
  111.             goto err_close_input;
  112.         }
  113.         avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
  114.         avcodec_copy_context(st->codec, qc->fmtctx->streams[i]->codec);
  115.     }
  116.  
  117.     return 0;
  118.  
  119.   err_close_input:
  120.     avformat_close_input(&qc->fmtctx);
  121.   err_quvi_cleanup:
  122.     quvi_parse_close(&m);
  123.   err_quvi_close:
  124.     quvi_close(&q);
  125.     return ret;
  126. }
  127.  
  128. static int libquvi_read_packet(AVFormatContext *s, AVPacket *pkt)
  129. {
  130.     LibQuviContext *qc = s->priv_data;
  131.     return av_read_frame(qc->fmtctx, pkt);
  132. }
  133.  
  134. static int libquvi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
  135. {
  136.     LibQuviContext *qc = s->priv_data;
  137.     return av_seek_frame(qc->fmtctx, stream_index, timestamp, flags);
  138. }
  139.  
  140. static int libquvi_probe(AVProbeData *p)
  141. {
  142.     int score;
  143.     quvi_t q;
  144.     QUVIcode rc;
  145.  
  146.     rc = quvi_init(&q);
  147.     if (rc != QUVI_OK)
  148.         return AVERROR(ENOMEM);
  149.     score = quvi_supported(q, (char *)p->filename) == QUVI_OK ? AVPROBE_SCORE_EXTENSION : 0;
  150.     quvi_close(&q);
  151.     return score;
  152. }
  153.  
  154. AVInputFormat ff_libquvi_demuxer = {
  155.     .name           = "libquvi",
  156.     .long_name      = NULL_IF_CONFIG_SMALL("libquvi demuxer"),
  157.     .priv_data_size = sizeof(LibQuviContext),
  158.     .read_probe     = libquvi_probe,
  159.     .read_header    = libquvi_read_header,
  160.     .read_packet    = libquvi_read_packet,
  161.     .read_close     = libquvi_close,
  162.     .read_seek      = libquvi_read_seek,
  163.     .priv_class     = &libquvi_context_class,
  164.     .flags          = AVFMT_NOFILE,
  165. };
  166.