dsputil: Move Bink-specific add_pixels8 to binkdsp
[ffmpeg.git] / libavformat / pva.c
index 76b7fb1..3abfc18 100644 (file)
@@ -2,24 +2,25 @@
  * TechnoTrend PVA (.pva) demuxer
  * Copyright (c) 2007, 2008 Ivo van Poorten
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "avformat.h"
+#include "internal.h"
 #include "mpeg.h"
 
 #define PVA_MAX_PAYLOAD_LENGTH  0x17f8
@@ -35,66 +36,73 @@ static int pva_probe(AVProbeData * pd) {
     unsigned char *buf = pd->buf;
 
     if (AV_RB16(buf) == PVA_MAGIC && buf[2] && buf[2] < 3 && buf[4] == 0x55)
-        return AVPROBE_SCORE_MAX / 2;
+        return AVPROBE_SCORE_EXTENSION;
 
     return 0;
 }
 
-static int pva_read_header(AVFormatContext *s, AVFormatParameters *ap) {
+static int pva_read_header(AVFormatContext *s) {
     AVStream *st;
 
-    if (!(st = av_new_stream(s, 0)))
+    if (!(st = avformat_new_stream(s, NULL)))
         return AVERROR(ENOMEM);
-    st->codec->codec_type = CODEC_TYPE_VIDEO;
-    st->codec->codec_id   = CODEC_ID_MPEG2VIDEO;
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id   = AV_CODEC_ID_MPEG2VIDEO;
     st->need_parsing      = AVSTREAM_PARSE_FULL;
-    av_set_pts_info(st, 32, 1, 90000);
+    avpriv_set_pts_info(st, 32, 1, 90000);
+    av_add_index_entry(st, 0, 0, 0, 0, AVINDEX_KEYFRAME);
 
-    if (!(st = av_new_stream(s, 1)))
+    if (!(st = avformat_new_stream(s, NULL)))
         return AVERROR(ENOMEM);
-    st->codec->codec_type = CODEC_TYPE_AUDIO;
-    st->codec->codec_id   = CODEC_ID_MP2;
-    st->need_parsing      = AVSTREAM_PARSE_HEADERS;
-    av_set_pts_info(st, 33, 1, 90000);
+    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id   = AV_CODEC_ID_MP2;
+    st->need_parsing      = AVSTREAM_PARSE_FULL;
+    avpriv_set_pts_info(st, 33, 1, 90000);
+    av_add_index_entry(st, 0, 0, 0, 0, AVINDEX_KEYFRAME);
 
     /* the parameters will be extracted from the compressed bitstream */
     return 0;
 }
 
-static int pva_read_packet(AVFormatContext *s, AVPacket *pkt) {
-    ByteIOContext *pb = s->pb;
+#define pva_log if (read_packet) av_log
+
+static int read_part_of_packet(AVFormatContext *s, int64_t *pts,
+                               int *len, int *strid, int read_packet) {
+    AVIOContext *pb = s->pb;
     PVAContext *pvactx = s->priv_data;
-    int ret, syncword, streamid, reserved, flags, length, pts_flag;
-    int64_t pva_pts = AV_NOPTS_VALUE;
+    int syncword, streamid, reserved, flags, length, pts_flag;
+    int64_t pva_pts = AV_NOPTS_VALUE, startpos;
 
 recover:
-    syncword = get_be16(pb);
-    streamid = get_byte(pb);
-    get_byte(pb);               /* counter not used */
-    reserved = get_byte(pb);
-    flags    = get_byte(pb);
-    length   = get_be16(pb);
+    startpos = avio_tell(pb);
+
+    syncword = avio_rb16(pb);
+    streamid = avio_r8(pb);
+    avio_r8(pb);               /* counter not used */
+    reserved = avio_r8(pb);
+    flags    = avio_r8(pb);
+    length   = avio_rb16(pb);
 
     pts_flag = flags & 0x10;
 
     if (syncword != PVA_MAGIC) {
-        av_log(s, AV_LOG_ERROR, "invalid syncword\n");
+        pva_log(s, AV_LOG_ERROR, "invalid syncword\n");
         return AVERROR(EIO);
     }
     if (streamid != PVA_VIDEO_PAYLOAD && streamid != PVA_AUDIO_PAYLOAD) {
-        av_log(s, AV_LOG_ERROR, "invalid streamid\n");
+        pva_log(s, AV_LOG_ERROR, "invalid streamid\n");
         return AVERROR(EIO);
     }
     if (reserved != 0x55) {
-        av_log(s, AV_LOG_WARNING, "expected reserved byte to be 0x55\n");
+        pva_log(s, AV_LOG_WARNING, "expected reserved byte to be 0x55\n");
     }
     if (length > PVA_MAX_PAYLOAD_LENGTH) {
-        av_log(s, AV_LOG_ERROR, "invalid payload length %u\n", length);
+        pva_log(s, AV_LOG_ERROR, "invalid payload length %u\n", length);
         return AVERROR(EIO);
     }
 
     if (streamid == PVA_VIDEO_PAYLOAD && pts_flag) {
-        pva_pts = get_be32(pb);
+        pva_pts = avio_rb32(pb);
         length -= 4;
     } else if (streamid == PVA_AUDIO_PAYLOAD) {
         /* PVA Audio Packets either start with a signaled PES packet or
@@ -106,20 +114,22 @@ recover:
                 pes_flags;
             unsigned char pes_header_data[256];
 
-            pes_signal             = get_be24(pb);
-            get_byte(pb);
-            pes_packet_length      = get_be16(pb);
-            pes_flags              = get_be16(pb);
-            pes_header_data_length = get_byte(pb);
+            pes_signal             = avio_rb24(pb);
+            avio_r8(pb);
+            pes_packet_length      = avio_rb16(pb);
+            pes_flags              = avio_rb16(pb);
+            pes_header_data_length = avio_r8(pb);
 
             if (pes_signal != 1) {
-                av_log(s, AV_LOG_WARNING, "expected signaled PES packet, "
+                pva_log(s, AV_LOG_WARNING, "expected signaled PES packet, "
                                           "trying to recover\n");
-                url_fskip(pb, length - 9);
+                avio_skip(pb, length - 9);
+                if (!read_packet)
+                    return AVERROR(EIO);
                 goto recover;
             }
 
-            get_buffer(pb, pes_header_data, pes_header_data_length);
+            avio_read(pb, pes_header_data, pes_header_data_length);
             length -= 9 + pes_header_data_length;
 
             pes_packet_length -= 3 + pes_header_data_length;
@@ -133,12 +143,27 @@ recover:
         pvactx->continue_pes -= length;
 
         if (pvactx->continue_pes < 0) {
-            av_log(s, AV_LOG_WARNING, "audio data corruption\n");
+            pva_log(s, AV_LOG_WARNING, "audio data corruption\n");
             pvactx->continue_pes = 0;
         }
     }
 
-    if ((ret = av_get_packet(pb, pkt, length)) <= 0)
+    if (pva_pts != AV_NOPTS_VALUE)
+        av_add_index_entry(s->streams[streamid-1], startpos, pva_pts, 0, 0, AVINDEX_KEYFRAME);
+
+    *pts   = pva_pts;
+    *len   = length;
+    *strid = streamid;
+    return 0;
+}
+
+static int pva_read_packet(AVFormatContext *s, AVPacket *pkt) {
+    AVIOContext *pb = s->pb;
+    int64_t pva_pts;
+    int ret, length, streamid;
+
+    if (read_part_of_packet(s, &pva_pts, &length, &streamid, 1) < 0 ||
+       (ret = av_get_packet(pb, pkt, length)) <= 0)
         return AVERROR(EIO);
 
     pkt->stream_index = streamid - 1;
@@ -147,11 +172,41 @@ recover:
     return ret;
 }
 
-AVInputFormat pva_demuxer = {
-    "pva",
-    "pva file and stream format",
-    sizeof(PVAContext),
-    pva_probe,
-    pva_read_header,
-    pva_read_packet,
+static int64_t pva_read_timestamp(struct AVFormatContext *s, int stream_index,
+                                          int64_t *pos, int64_t pos_limit) {
+    AVIOContext *pb = s->pb;
+    PVAContext *pvactx = s->priv_data;
+    int length, streamid;
+    int64_t res = AV_NOPTS_VALUE;
+
+    pos_limit = FFMIN(*pos+PVA_MAX_PAYLOAD_LENGTH*8, (uint64_t)*pos+pos_limit);
+
+    while (*pos < pos_limit) {
+        res = AV_NOPTS_VALUE;
+        avio_seek(pb, *pos, SEEK_SET);
+
+        pvactx->continue_pes = 0;
+        if (read_part_of_packet(s, &res, &length, &streamid, 0)) {
+            (*pos)++;
+            continue;
+        }
+        if (streamid - 1 != stream_index || res == AV_NOPTS_VALUE) {
+            *pos = avio_tell(pb) + length;
+            continue;
+        }
+        break;
+    }
+
+    pvactx->continue_pes = 0;
+    return res;
+}
+
+AVInputFormat ff_pva_demuxer = {
+    .name           = "pva",
+    .long_name      = NULL_IF_CONFIG_SMALL("TechnoTrend PVA"),
+    .priv_data_size = sizeof(PVAContext),
+    .read_probe     = pva_probe,
+    .read_header    = pva_read_header,
+    .read_packet    = pva_read_packet,
+    .read_timestamp = pva_read_timestamp,
 };