/*
- * AVISynth support for ffmpeg system
- * Copyright (c) 2006 DivX, Inc.
+ * AviSynth/AvxSynth support
+ * Copyright (c) 2012 AvxSynth Team.
*
* This file is part of Libav.
*
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/internal.h"
+#include "libavcodec/internal.h"
#include "avformat.h"
-#include "riff.h"
-
-#include <windows.h>
-#include <vfw.h>
-
-typedef struct {
- PAVISTREAM handle;
- AVISTREAMINFO info;
- DWORD read;
- LONG chunck_size;
- LONG chunck_samples;
-} AVISynthStream;
-
-typedef struct {
- PAVIFILE file;
- AVISynthStream *streams;
- int nb_streams;
- int next_stream;
-} AVISynthContext;
-
-static int avisynth_read_header(AVFormatContext *s, AVFormatParameters *ap)
+#include "internal.h"
+#include "config.h"
+
+/* Enable function pointer definitions for runtime loading. */
+#define AVSC_NO_DECLSPEC
+
+/* Platform-specific directives for AviSynth vs AvxSynth. */
+#ifdef _WIN32
+ #include <windows.h>
+ #undef EXTERN_C
+ #include <avisynth/avisynth_c.h>
+ #define AVISYNTH_LIB "avisynth"
+ #define USING_AVISYNTH
+#else
+ #include <dlfcn.h>
+ #include <avxsynth/avxsynth_c.h>
+ #define AVISYNTH_NAME "libavxsynth"
+ #define AVISYNTH_LIB AVISYNTH_NAME SLIBSUF
+
+ #define LoadLibrary(x) dlopen(x, RTLD_NOW | RTLD_LOCAL)
+ #define GetProcAddress dlsym
+ #define FreeLibrary dlclose
+#endif
+
+typedef struct AviSynthLibrary {
+ void *library;
+#define AVSC_DECLARE_FUNC(name) name ## _func name
+ AVSC_DECLARE_FUNC(avs_bit_blt);
+ AVSC_DECLARE_FUNC(avs_clip_get_error);
+ AVSC_DECLARE_FUNC(avs_create_script_environment);
+ AVSC_DECLARE_FUNC(avs_delete_script_environment);
+ AVSC_DECLARE_FUNC(avs_get_audio);
+ AVSC_DECLARE_FUNC(avs_get_error);
+ AVSC_DECLARE_FUNC(avs_get_frame);
+ AVSC_DECLARE_FUNC(avs_get_version);
+ AVSC_DECLARE_FUNC(avs_get_video_info);
+ AVSC_DECLARE_FUNC(avs_invoke);
+ AVSC_DECLARE_FUNC(avs_release_clip);
+ AVSC_DECLARE_FUNC(avs_release_value);
+ AVSC_DECLARE_FUNC(avs_release_video_frame);
+ AVSC_DECLARE_FUNC(avs_take_clip);
+#ifdef USING_AVISYNTH
+ AVSC_DECLARE_FUNC(avs_bits_per_pixel);
+ AVSC_DECLARE_FUNC(avs_get_height_p);
+ AVSC_DECLARE_FUNC(avs_get_pitch_p);
+ AVSC_DECLARE_FUNC(avs_get_read_ptr_p);
+ AVSC_DECLARE_FUNC(avs_get_row_size_p);
+ AVSC_DECLARE_FUNC(avs_is_yv24);
+ AVSC_DECLARE_FUNC(avs_is_yv16);
+ AVSC_DECLARE_FUNC(avs_is_yv411);
+ AVSC_DECLARE_FUNC(avs_is_y8);
+#endif
+#undef AVSC_DECLARE_FUNC
+} AviSynthLibrary;
+
+typedef struct AviSynthContext {
+ AVS_ScriptEnvironment *env;
+ AVS_Clip *clip;
+ const AVS_VideoInfo *vi;
+
+ /* avisynth_read_packet_video() iterates over this. */
+ int n_planes;
+ const int *planes;
+
+ int curr_stream;
+ int curr_frame;
+ int64_t curr_sample;
+
+ int error;
+
+ /* Linked list pointers. */
+ struct AviSynthContext *next;
+} AviSynthContext;
+
+static const int avs_planes_packed[1] = { 0 };
+static const int avs_planes_grey[1] = { AVS_PLANAR_Y };
+static const int avs_planes_yuv[3] = { AVS_PLANAR_Y, AVS_PLANAR_U,
+ AVS_PLANAR_V };
+
+/* A conflict between C++ global objects, atexit, and dynamic loading requires
+ * us to register our own atexit handler to prevent double freeing. */
+static AviSynthLibrary avs_library;
+static int avs_atexit_called = 0;
+
+/* Linked list of AviSynthContexts. An atexit handler destroys this list. */
+static AviSynthContext *avs_ctx_list = NULL;
+
+static av_cold void avisynth_atexit_handler(void);
+
+static av_cold int avisynth_load_library(void)
{
- AVISynthContext *avs = s->priv_data;
- HRESULT res;
- AVIFILEINFO info;
- DWORD id;
- AVStream *st;
- AVISynthStream *stream;
-
- AVIFileInit();
-
- res = AVIFileOpen(&avs->file, s->filename, OF_READ|OF_SHARE_DENY_WRITE, NULL);
- if (res != S_OK)
- {
- av_log(s, AV_LOG_ERROR, "AVIFileOpen failed with error %ld", res);
- AVIFileExit();
- return -1;
- }
-
- res = AVIFileInfo(avs->file, &info, sizeof(info));
- if (res != S_OK)
- {
- av_log(s, AV_LOG_ERROR, "AVIFileInfo failed with error %ld", res);
- AVIFileExit();
- return -1;
- }
-
- avs->streams = av_mallocz(info.dwStreams * sizeof(AVISynthStream));
-
- for (id=0; id<info.dwStreams; id++)
- {
- stream = &avs->streams[id];
- stream->read = 0;
- if (AVIFileGetStream(avs->file, &stream->handle, 0, id) == S_OK)
- {
- if (AVIStreamInfo(stream->handle, &stream->info, sizeof(stream->info)) == S_OK)
- {
- if (stream->info.fccType == streamtypeAUDIO)
- {
- WAVEFORMATEX wvfmt;
- LONG struct_size = sizeof(WAVEFORMATEX);
- if (AVIStreamReadFormat(stream->handle, 0, &wvfmt, &struct_size) != S_OK)
- continue;
-
- st = avformat_new_stream(s, NULL);
- st->id = id;
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
-
- st->codec->block_align = wvfmt.nBlockAlign;
- st->codec->channels = wvfmt.nChannels;
- st->codec->sample_rate = wvfmt.nSamplesPerSec;
- st->codec->bit_rate = wvfmt.nAvgBytesPerSec * 8;
- st->codec->bits_per_coded_sample = wvfmt.wBitsPerSample;
-
- stream->chunck_samples = wvfmt.nSamplesPerSec * (uint64_t)info.dwScale / (uint64_t)info.dwRate;
- stream->chunck_size = stream->chunck_samples * wvfmt.nChannels * wvfmt.wBitsPerSample / 8;
-
- st->codec->codec_tag = wvfmt.wFormatTag;
- st->codec->codec_id = ff_wav_codec_get_id(wvfmt.wFormatTag, st->codec->bits_per_coded_sample);
- }
- else if (stream->info.fccType == streamtypeVIDEO)
- {
- BITMAPINFO imgfmt;
- LONG struct_size = sizeof(BITMAPINFO);
-
- stream->chunck_size = stream->info.dwSampleSize;
- stream->chunck_samples = 1;
-
- if (AVIStreamReadFormat(stream->handle, 0, &imgfmt, &struct_size) != S_OK)
- continue;
-
- st = avformat_new_stream(s, NULL);
- st->id = id;
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->r_frame_rate.num = stream->info.dwRate;
- st->r_frame_rate.den = stream->info.dwScale;
-
- st->codec->width = imgfmt.bmiHeader.biWidth;
- st->codec->height = imgfmt.bmiHeader.biHeight;
-
- st->codec->bits_per_coded_sample = imgfmt.bmiHeader.biBitCount;
- st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale;
- st->codec->codec_tag = imgfmt.bmiHeader.biCompression;
- st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, imgfmt.bmiHeader.biCompression);
-
- st->duration = stream->info.dwLength;
- }
- else
- {
- AVIStreamRelease(stream->handle);
- continue;
- }
-
- avs->nb_streams++;
-
- st->codec->stream_codec_tag = stream->info.fccHandler;
-
- av_set_pts_info(st, 64, info.dwScale, info.dwRate);
- st->start_time = stream->info.dwStart;
- }
+ avs_library.library = LoadLibrary(AVISYNTH_LIB);
+ if (!avs_library.library)
+ return AVERROR_UNKNOWN;
+
+#define LOAD_AVS_FUNC(name, continue_on_fail) \
+ avs_library.name = \
+ (void *)GetProcAddress(avs_library.library, #name); \
+ if (!continue_on_fail && !avs_library.name) \
+ goto fail;
+
+ LOAD_AVS_FUNC(avs_bit_blt, 0);
+ LOAD_AVS_FUNC(avs_clip_get_error, 0);
+ LOAD_AVS_FUNC(avs_create_script_environment, 0);
+ LOAD_AVS_FUNC(avs_delete_script_environment, 0);
+ LOAD_AVS_FUNC(avs_get_audio, 0);
+ LOAD_AVS_FUNC(avs_get_error, 1); // New to AviSynth 2.6
+ LOAD_AVS_FUNC(avs_get_frame, 0);
+ LOAD_AVS_FUNC(avs_get_version, 0);
+ LOAD_AVS_FUNC(avs_get_video_info, 0);
+ LOAD_AVS_FUNC(avs_invoke, 0);
+ LOAD_AVS_FUNC(avs_release_clip, 0);
+ LOAD_AVS_FUNC(avs_release_value, 0);
+ LOAD_AVS_FUNC(avs_release_video_frame, 0);
+ LOAD_AVS_FUNC(avs_take_clip, 0);
+#ifdef USING_AVISYNTH
+ LOAD_AVS_FUNC(avs_bits_per_pixel, 1);
+ LOAD_AVS_FUNC(avs_get_height_p, 1);
+ LOAD_AVS_FUNC(avs_get_pitch_p, 1);
+ LOAD_AVS_FUNC(avs_get_read_ptr_p, 1);
+ LOAD_AVS_FUNC(avs_get_row_size_p, 1);
+ LOAD_AVS_FUNC(avs_is_yv24, 1);
+ LOAD_AVS_FUNC(avs_is_yv16, 1);
+ LOAD_AVS_FUNC(avs_is_yv411, 1);
+ LOAD_AVS_FUNC(avs_is_y8, 1);
+#endif
+#undef LOAD_AVS_FUNC
+
+ atexit(avisynth_atexit_handler);
+ return 0;
+
+fail:
+ FreeLibrary(avs_library.library);
+ return AVERROR_UNKNOWN;
+}
+
+/* Note that avisynth_context_create and avisynth_context_destroy
+ * do not allocate or free the actual context! That is taken care of
+ * by libavformat. */
+static av_cold int avisynth_context_create(AVFormatContext *s)
+{
+ AviSynthContext *avs = s->priv_data;
+ int ret;
+
+ if (!avs_library.library)
+ if (ret = avisynth_load_library())
+ return ret;
+
+ avs->env = avs_library.avs_create_script_environment(3);
+ if (avs_library.avs_get_error) {
+ const char *error = avs_library.avs_get_error(avs->env);
+ if (error) {
+ av_log(s, AV_LOG_ERROR, "%s\n", error);
+ return AVERROR_UNKNOWN;
}
}
- return 0;
+ if (!avs_ctx_list) {
+ avs_ctx_list = avs;
+ } else {
+ avs->next = avs_ctx_list;
+ avs_ctx_list = avs;
+ }
+
+ return 0;
}
-static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
+static av_cold void avisynth_context_destroy(AviSynthContext *avs)
+{
+ if (avs_atexit_called)
+ return;
+
+ if (avs == avs_ctx_list) {
+ avs_ctx_list = avs->next;
+ } else {
+ AviSynthContext *prev = avs_ctx_list;
+ while (prev->next != avs)
+ prev = prev->next;
+ prev->next = avs->next;
+ }
+
+ if (avs->clip) {
+ avs_library.avs_release_clip(avs->clip);
+ avs->clip = NULL;
+ }
+ if (avs->env) {
+ avs_library.avs_delete_script_environment(avs->env);
+ avs->env = NULL;
+ }
+}
+
+static av_cold void avisynth_atexit_handler(void)
+{
+ AviSynthContext *avs = avs_ctx_list;
+
+ while (avs) {
+ AviSynthContext *next = avs->next;
+ avisynth_context_destroy(avs);
+ avs = next;
+ }
+ FreeLibrary(avs_library.library);
+
+ avs_atexit_called = 1;
+}
+
+/* Create AVStream from audio and video data. */
+static int avisynth_create_stream_video(AVFormatContext *s, AVStream *st)
+{
+ AviSynthContext *avs = s->priv_data;
+ int planar = 0; // 0: packed, 1: YUV, 2: Y8
+
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+ st->codec->width = avs->vi->width;
+ st->codec->height = avs->vi->height;
+
+ st->time_base = (AVRational) { avs->vi->fps_denominator,
+ avs->vi->fps_numerator };
+ st->avg_frame_rate = (AVRational) { avs->vi->fps_numerator,
+ avs->vi->fps_denominator };
+ st->start_time = 0;
+ st->duration = avs->vi->num_frames;
+ st->nb_frames = avs->vi->num_frames;
+
+ switch (avs->vi->pixel_type) {
+#ifdef USING_AVISYNTH
+ case AVS_CS_YV24:
+ st->codec->pix_fmt = AV_PIX_FMT_YUV444P;
+ planar = 1;
+ break;
+ case AVS_CS_YV16:
+ st->codec->pix_fmt = AV_PIX_FMT_YUV422P;
+ planar = 1;
+ break;
+ case AVS_CS_YV411:
+ st->codec->pix_fmt = AV_PIX_FMT_YUV411P;
+ planar = 1;
+ break;
+ case AVS_CS_Y8:
+ st->codec->pix_fmt = AV_PIX_FMT_GRAY8;
+ planar = 2;
+ break;
+#endif
+ case AVS_CS_BGR24:
+ st->codec->pix_fmt = AV_PIX_FMT_BGR24;
+ break;
+ case AVS_CS_BGR32:
+ st->codec->pix_fmt = AV_PIX_FMT_RGB32;
+ break;
+ case AVS_CS_YUY2:
+ st->codec->pix_fmt = AV_PIX_FMT_YUYV422;
+ break;
+ case AVS_CS_YV12:
+ st->codec->pix_fmt = AV_PIX_FMT_YUV420P;
+ planar = 1;
+ break;
+ case AVS_CS_I420: // Is this even used anywhere?
+ st->codec->pix_fmt = AV_PIX_FMT_YUV420P;
+ planar = 1;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR,
+ "unknown AviSynth colorspace %d\n", avs->vi->pixel_type);
+ avs->error = 1;
+ return AVERROR_UNKNOWN;
+ }
+
+ switch (planar) {
+ case 2: // Y8
+ avs->n_planes = 1;
+ avs->planes = avs_planes_grey;
+ break;
+ case 1: // YUV
+ avs->n_planes = 3;
+ avs->planes = avs_planes_yuv;
+ break;
+ default:
+ avs->n_planes = 1;
+ avs->planes = avs_planes_packed;
+ }
+ return 0;
+}
+
+static int avisynth_create_stream_audio(AVFormatContext *s, AVStream *st)
+{
+ AviSynthContext *avs = s->priv_data;
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->sample_rate = avs->vi->audio_samples_per_second;
+ st->codec->channels = avs->vi->nchannels;
+ st->time_base = (AVRational) { 1,
+ avs->vi->audio_samples_per_second };
+ st->duration = avs->vi->num_audio_samples;
+
+ switch (avs->vi->sample_type) {
+ case AVS_SAMPLE_INT8:
+ st->codec->codec_id = AV_CODEC_ID_PCM_U8;
+ break;
+ case AVS_SAMPLE_INT16:
+ st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
+ break;
+ case AVS_SAMPLE_INT24:
+ st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
+ break;
+ case AVS_SAMPLE_INT32:
+ st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
+ break;
+ case AVS_SAMPLE_FLOAT:
+ st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR,
+ "unknown AviSynth sample type %d\n", avs->vi->sample_type);
+ avs->error = 1;
+ return AVERROR_UNKNOWN;
+ }
+ return 0;
+}
+
+static int avisynth_create_stream(AVFormatContext *s)
+{
+ AviSynthContext *avs = s->priv_data;
+ AVStream *st;
+ int ret;
+ int id = 0;
+
+ if (avs_has_video(avs->vi)) {
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR_UNKNOWN;
+ st->id = id++;
+ if (ret = avisynth_create_stream_video(s, st))
+ return ret;
+ }
+ if (avs_has_audio(avs->vi)) {
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR_UNKNOWN;
+ st->id = id++;
+ if (ret = avisynth_create_stream_audio(s, st))
+ return ret;
+ }
+ return 0;
+}
+
+static int avisynth_open_file(AVFormatContext *s)
+{
+ AviSynthContext *avs = s->priv_data;
+ AVS_Value arg, val;
+ int ret;
+#ifdef USING_AVISYNTH
+ char filename_ansi[MAX_PATH * 4];
+ wchar_t filename_wc[MAX_PATH * 4];
+#endif
+
+ if (ret = avisynth_context_create(s))
+ return ret;
+
+#ifdef USING_AVISYNTH
+ /* Convert UTF-8 to ANSI code page */
+ MultiByteToWideChar(CP_UTF8, 0, s->filename, -1, filename_wc, MAX_PATH * 4);
+ WideCharToMultiByte(CP_THREAD_ACP, 0, filename_wc, -1, filename_ansi,
+ MAX_PATH * 4, NULL, NULL);
+ arg = avs_new_value_string(filename_ansi);
+#else
+ arg = avs_new_value_string(s->filename);
+#endif
+ val = avs_library.avs_invoke(avs->env, "Import", arg, 0);
+ if (avs_is_error(val)) {
+ av_log(s, AV_LOG_ERROR, "%s\n", avs_as_error(val));
+ ret = AVERROR_UNKNOWN;
+ goto fail;
+ }
+ if (!avs_is_clip(val)) {
+ av_log(s, AV_LOG_ERROR, "AviSynth script did not return a clip\n");
+ ret = AVERROR_UNKNOWN;
+ goto fail;
+ }
+
+ avs->clip = avs_library.avs_take_clip(val, avs->env);
+ avs->vi = avs_library.avs_get_video_info(avs->clip);
+
+#ifdef USING_AVISYNTH
+ /* On Windows, libav supports AviSynth interface version 6 or higher.
+ * This includes AviSynth 2.6 RC1 or higher, and AviSynth+ r1718 or higher,
+ * and excludes 2.5 and the 2.6 alphas. Since AvxSynth identifies itself
+ * as interface version 3 like 2.5.8, this needs to be special-cased. */
+
+ if (avs_library.avs_get_version(avs->clip) < 6) {
+ av_log(s, AV_LOG_ERROR,
+ "AviSynth version is too old. Please upgrade to either AviSynth 2.6 >= RC1 or AviSynth+ >= r1718.\n");
+ ret = AVERROR_UNKNOWN;
+ goto fail;
+ }
+#endif
+
+ /* Release the AVS_Value as it will go out of scope. */
+ avs_library.avs_release_value(val);
+
+ if (ret = avisynth_create_stream(s))
+ goto fail;
+
+ return 0;
+
+fail:
+ avisynth_context_destroy(avs);
+ return ret;
+}
+
+static void avisynth_next_stream(AVFormatContext *s, AVStream **st,
+ AVPacket *pkt, int *discard)
{
- AVISynthContext *avs = s->priv_data;
- HRESULT res;
- AVISynthStream *stream;
- int stream_id = avs->next_stream;
- LONG read_size;
+ AviSynthContext *avs = s->priv_data;
- // handle interleaving manually...
- stream = &avs->streams[stream_id];
+ avs->curr_stream++;
+ avs->curr_stream %= s->nb_streams;
- if (stream->read >= stream->info.dwLength)
- return AVERROR(EIO);
+ *st = s->streams[avs->curr_stream];
+ if ((*st)->discard == AVDISCARD_ALL)
+ *discard = 1;
+ else
+ *discard = 0;
- if (av_new_packet(pkt, stream->chunck_size))
- return AVERROR(EIO);
- pkt->stream_index = stream_id;
- pkt->pts = avs->streams[stream_id].read / avs->streams[stream_id].chunck_samples;
+ return;
+}
- res = AVIStreamRead(stream->handle, stream->read, stream->chunck_samples, pkt->data, stream->chunck_size, &read_size, NULL);
+/* Copy AviSynth clip data into an AVPacket. */
+static int avisynth_read_packet_video(AVFormatContext *s, AVPacket *pkt,
+ int discard)
+{
+ AviSynthContext *avs = s->priv_data;
+ AVS_VideoFrame *frame;
+ unsigned char *dst_p;
+ const unsigned char *src_p;
+ int n, i, plane, rowsize, planeheight, pitch, bits;
+ const char *error;
+
+ if (avs->curr_frame >= avs->vi->num_frames)
+ return AVERROR_EOF;
+
+ /* This must happen even if the stream is discarded to prevent desync. */
+ n = avs->curr_frame++;
+ if (discard)
+ return 0;
+
+#ifdef USING_AVISYNTH
+ /* Define the bpp values for the new AviSynth 2.6 colorspaces.
+ * Since AvxSynth doesn't have these functions, special-case
+ * it in order to avoid implicit declaration errors. */
+
+ if (avs_library.avs_is_yv24(avs->vi))
+ bits = 24;
+ else if (avs_library.avs_is_yv16(avs->vi))
+ bits = 16;
+ else if (avs_library.avs_is_yv411(avs->vi))
+ bits = 12;
+ else if (avs_library.avs_is_y8(avs->vi))
+ bits = 8;
+ else
+ bits = avs_library.avs_bits_per_pixel(avs->vi);
+#else
+ bits = avs_bits_per_pixel(avs->vi);
+#endif
+
+ /* Without the cast to int64_t, calculation overflows at about 9k x 9k
+ * resolution. */
+ pkt->size = (((int64_t)avs->vi->width *
+ (int64_t)avs->vi->height) * bits) / 8;
+ if (!pkt->size)
+ return AVERROR_UNKNOWN;
+
+ if (av_new_packet(pkt, pkt->size) < 0)
+ return AVERROR(ENOMEM);
+
+ pkt->pts = n;
+ pkt->dts = n;
+ pkt->duration = 1;
+ pkt->stream_index = avs->curr_stream;
+
+ frame = avs_library.avs_get_frame(avs->clip, n);
+ error = avs_library.avs_clip_get_error(avs->clip);
+ if (error) {
+ av_log(s, AV_LOG_ERROR, "%s\n", error);
+ avs->error = 1;
+ av_packet_unref(pkt);
+ return AVERROR_UNKNOWN;
+ }
+
+ dst_p = pkt->data;
+ for (i = 0; i < avs->n_planes; i++) {
+ plane = avs->planes[i];
+#ifdef USING_AVISYNTH
+ src_p = avs_library.avs_get_read_ptr_p(frame, plane);
+ pitch = avs_library.avs_get_pitch_p(frame, plane);
+
+ rowsize = avs_library.avs_get_row_size_p(frame, plane);
+ planeheight = avs_library.avs_get_height_p(frame, plane);
+#else
+ src_p = avs_get_read_ptr_p(frame, plane);
+ pitch = avs_get_pitch_p(frame, plane);
+
+ rowsize = avs_get_row_size_p(frame, plane);
+ planeheight = avs_get_height_p(frame, plane);
+#endif
+
+ /* Flip RGB video. */
+ if (avs_is_rgb24(avs->vi) || avs_is_rgb(avs->vi)) {
+ src_p = src_p + (planeheight - 1) * pitch;
+ pitch = -pitch;
+ }
+
+ avs_library.avs_bit_blt(avs->env, dst_p, rowsize, src_p, pitch,
+ rowsize, planeheight);
+ dst_p += rowsize * planeheight;
+ }
- pkt->pts = stream->read;
- pkt->size = read_size;
+ avs_library.avs_release_video_frame(frame);
+ return 0;
+}
- stream->read += stream->chunck_samples;
+static int avisynth_read_packet_audio(AVFormatContext *s, AVPacket *pkt,
+ int discard)
+{
+ AviSynthContext *avs = s->priv_data;
+ AVRational fps, samplerate;
+ int samples;
+ int64_t n;
+ const char *error;
+
+ if (avs->curr_sample >= avs->vi->num_audio_samples)
+ return AVERROR_EOF;
+
+ fps.num = avs->vi->fps_numerator;
+ fps.den = avs->vi->fps_denominator;
+ samplerate.num = avs->vi->audio_samples_per_second;
+ samplerate.den = 1;
+
+ if (avs_has_video(avs->vi)) {
+ if (avs->curr_frame < avs->vi->num_frames)
+ samples = av_rescale_q(avs->curr_frame, samplerate, fps) -
+ avs->curr_sample;
+ else
+ samples = av_rescale_q(1, samplerate, fps);
+ } else {
+ samples = 1000;
+ }
- // prepare for the next stream to read
- do {
- avs->next_stream = (avs->next_stream+1) % avs->nb_streams;
- } while (avs->next_stream != stream_id && s->streams[avs->next_stream]->discard >= AVDISCARD_ALL);
+ /* After seeking, audio may catch up with video. */
+ if (samples <= 0) {
+ pkt->size = 0;
+ pkt->data = NULL;
+ return 0;
+ }
- return (res == S_OK) ? pkt->size : -1;
+ if (avs->curr_sample + samples > avs->vi->num_audio_samples)
+ samples = avs->vi->num_audio_samples - avs->curr_sample;
+
+ /* This must happen even if the stream is discarded to prevent desync. */
+ n = avs->curr_sample;
+ avs->curr_sample += samples;
+ if (discard)
+ return 0;
+
+ pkt->size = avs_bytes_per_channel_sample(avs->vi) *
+ samples * avs->vi->nchannels;
+ if (!pkt->size)
+ return AVERROR_UNKNOWN;
+
+ if (av_new_packet(pkt, pkt->size) < 0)
+ return AVERROR(ENOMEM);
+
+ pkt->pts = n;
+ pkt->dts = n;
+ pkt->duration = samples;
+ pkt->stream_index = avs->curr_stream;
+
+ avs_library.avs_get_audio(avs->clip, pkt->data, n, samples);
+ error = avs_library.avs_clip_get_error(avs->clip);
+ if (error) {
+ av_log(s, AV_LOG_ERROR, "%s\n", error);
+ avs->error = 1;
+ av_packet_unref(pkt);
+ return AVERROR_UNKNOWN;
+ }
+ return 0;
}
-static int avisynth_read_close(AVFormatContext *s)
+static av_cold int avisynth_read_header(AVFormatContext *s)
{
- AVISynthContext *avs = s->priv_data;
- int i;
+ int ret;
+
+ // Calling library must implement a lock for thread-safe opens.
+ if (ret = avpriv_lock_avformat())
+ return ret;
+
+ if (ret = avisynth_open_file(s)) {
+ avpriv_unlock_avformat();
+ return ret;
+ }
+
+ avpriv_unlock_avformat();
+ return 0;
+}
- for (i=0;i<avs->nb_streams;i++)
- {
- AVIStreamRelease(avs->streams[i].handle);
+static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ AviSynthContext *avs = s->priv_data;
+ AVStream *st;
+ int discard = 0;
+ int ret;
+
+ if (avs->error)
+ return AVERROR_UNKNOWN;
+
+ /* If either stream reaches EOF, try to read the other one before
+ * giving up. */
+ avisynth_next_stream(s, &st, pkt, &discard);
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ ret = avisynth_read_packet_video(s, pkt, discard);
+ if (ret == AVERROR_EOF && avs_has_audio(avs->vi)) {
+ avisynth_next_stream(s, &st, pkt, &discard);
+ return avisynth_read_packet_audio(s, pkt, discard);
+ }
+ } else {
+ ret = avisynth_read_packet_audio(s, pkt, discard);
+ if (ret == AVERROR_EOF && avs_has_video(avs->vi)) {
+ avisynth_next_stream(s, &st, pkt, &discard);
+ return avisynth_read_packet_video(s, pkt, discard);
+ }
}
- av_free(avs->streams);
- AVIFileRelease(avs->file);
- AVIFileExit();
- return 0;
+ return ret;
}
-static int avisynth_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
+static av_cold int avisynth_read_close(AVFormatContext *s)
{
- AVISynthContext *avs = s->priv_data;
- int stream_id;
+ if (avpriv_lock_avformat())
+ return AVERROR_UNKNOWN;
- for (stream_id = 0; stream_id < avs->nb_streams; stream_id++)
- {
- avs->streams[stream_id].read = pts * avs->streams[stream_id].chunck_samples;
+ avisynth_context_destroy(s->priv_data);
+ avpriv_unlock_avformat();
+ return 0;
+}
+
+static int avisynth_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
+{
+ AviSynthContext *avs = s->priv_data;
+ AVStream *st;
+ AVRational fps, samplerate;
+
+ if (avs->error)
+ return AVERROR_UNKNOWN;
+
+ fps = (AVRational) { avs->vi->fps_numerator,
+ avs->vi->fps_denominator };
+ samplerate = (AVRational) { avs->vi->audio_samples_per_second, 1 };
+
+ st = s->streams[stream_index];
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ /* AviSynth frame counts are signed int. */
+ if ((timestamp >= avs->vi->num_frames) ||
+ (timestamp > INT_MAX) ||
+ (timestamp < 0))
+ return AVERROR_EOF;
+ avs->curr_frame = timestamp;
+ if (avs_has_audio(avs->vi))
+ avs->curr_sample = av_rescale_q(timestamp, samplerate, fps);
+ } else {
+ if ((timestamp >= avs->vi->num_audio_samples) || (timestamp < 0))
+ return AVERROR_EOF;
+ /* Force frame granularity for seeking. */
+ if (avs_has_video(avs->vi)) {
+ avs->curr_frame = av_rescale_q(timestamp, fps, samplerate);
+ avs->curr_sample = av_rescale_q(avs->curr_frame, samplerate, fps);
+ } else {
+ avs->curr_sample = timestamp;
+ }
}
- return 0;
+ return 0;
}
AVInputFormat ff_avisynth_demuxer = {
- .name = "avs",
- .long_name = NULL_IF_CONFIG_SMALL("AVISynth"),
- .priv_data_size = sizeof(AVISynthContext),
+ .name = "avisynth",
+ .long_name = NULL_IF_CONFIG_SMALL("AviSynth script"),
+ .priv_data_size = sizeof(AviSynthContext),
.read_header = avisynth_read_header,
.read_packet = avisynth_read_packet,
.read_close = avisynth_read_close,
projects / ffmpeg / blobdiff